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Ideas for removing undercaoting. #1432089 05/08/13 01:14 AM 05/08/13 01:14 AM
Joined: Jan 2003 Posts: 569 Pasco, WA 440mag OP mopar
440mag OP mopar Joined: Jan 2003 Posts: 569 Pasco, WA	Just had the car sand basted but it left most of the undercoating. Stuff is hard as rock. I was going to try heat and a scraper. Lots of heat like a propane torch. What has worked for you guys?

Re: Ideas for removing undercaoting. [Re: 440mag] #1432090 05/08/13 01:19 AM 05/08/13 01:19 AM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	If it's hard as a rock the blaster guy didn't try.. But that said a needle scaler is effective.. As is a serious steam cleaner.. "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Ideas for removing undercaoting. [Re: 1_WILD_RT] #1432091 05/08/13 01:36 AM 05/08/13 01:36 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Steam cleaner hands down. Turn a hot burning week long messy job into a 3-4 hour aftenoon job with a 10 minute cleanup. EASY choice.

Re: Ideas for removing undercaoting. [Re: 440mag] #1432092 05/08/13 04:06 AM 05/08/13 04:06 AM
Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA Silver70 I Live Here
Silver70 I Live Here Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA	I usually do the same, propane torch with a scraper, then blast any residue that's left. I'm sure there are easier ways, but for cost, a propane bottle is cheap... takes some time, but it's not hard work. 68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram

Re: Ideas for removing undercaoting. [Re: ScottSmith_Harms] #1432093 05/08/13 11:55 AM 05/08/13 11:55 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Steam cleaner hands down. Turn a hot burning week long messy job into a 3-4 hour aftenoon job with a 10 minute cleanup. EASY choice. But now he can't use water because his car is bare metal now and it will rust bad if it get's wet. Always steam clean with a pressure washer before media blasting. I do the whole car top and bottem long before media blasting to ensure a grease and oil free car before blasting and then it's ready for primer within minutes after blasting. Even though I don't agree with silver70, it is too much senseless work for me to scrape it with a torch which damages the bottem of the car with scrape marks. I think this might be the OP only choice now unless he primes all the bare metal and starts over with washer and then blast again which is really bad for his sheet metal because media blasting stresses the metal, imo.

Re: Ideas for removing undercaoting. [Re: Challenger 1] #1432094 05/08/13 02:11 PM 05/08/13 02:11 PM
Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA Silver70 I Live Here
Silver70 I Live Here Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA	Problem for me is, when I do only do one that way every few years, it doesn't make sense for me to buy equipment I'll hardly use. Also it doesn't damage the metal or leave marks... it only takes a few seconds of heat and a thin scraper then won't dig into the metal... I'd have no problem doing it with an easier method, but I won't spend more $ than needed either.

Re: Ideas for removing undercaoting. [Re: Silver70] #1432095 05/08/13 02:27 PM 05/08/13 02:27 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	You can rent a steam cleaner at most any rental yard for under $100.00 a day. I suggest the largest/most powerful model they have. What I like about the steam is it does ZERO damage to the original metal. It will also leave all the original paint,primer,inspection markings, etc. Unless you actually try to remove them.

Re: Ideas for removing undercaoting. [Re: ScottSmith_Harms] #1432096 05/08/13 02:44 PM 05/08/13 02:44 PM
Joined: Aug 2010 Posts: 428 Oakville, Ontario, Canada CDN72SE mopar
CDN72SE mopar Joined: Aug 2010 Posts: 428 Oakville, Ontario, Canada	Did my 72 on my back in my garage with a scraper and torch from Home Depot, it's probably the only car I will ever be restoring so I have the patience to do this method and cheaper for me. A lot came off in decent size pieces so that was nice. For me cleanup was no big deal, didn't mind doing it.

Re: Ideas for removing undercaoting. [Re: CDN72SE] #1432097 05/08/13 04:47 PM 05/08/13 04:47 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Did my 72 on my back in my garage with a scraper and torch from Home Depot, it's probably the only car I will ever be restoring so I have the patience to do this method and cheaper for me. A lot came off in decent size pieces so that was nice. For me cleanup was no big deal, didn't mind doing it. On your back it would be impossible to use a steam cleaner, you would get burnt. Looks good .Check this out, couple hours and I had this. Not a speck of undercoating left anywhere and leaving all paint in place. Maybe the OP should leave the undercoaing there and add to it??

Re: Ideas for removing undercaoting. [Re: CDN72SE] #1432098 05/08/13 05:02 PM 05/08/13 05:02 PM
Joined: Jan 2007 Posts: 1,032 Ohio dobie super stock
dobie super stock Joined: Jan 2007 Posts: 1,032 Ohio	I used a little torch and a scraper for my RR. What a pain. 1968 Plymouth Road Runner 383 4 speed

Re: Ideas for removing undercaoting. [Re: ScottSmith_Harms] #1432099 05/08/13 10:44 PM 05/08/13 10:44 PM
Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA Silver70 I Live Here
Silver70 I Live Here Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA	Quote: You can rent a steam cleaner at most any rental yard for under $100.00 a day. I suggest the largest/most powerful model they have. What I like about the steam is it does ZERO damage to the original metal. It will also leave all the original paint,primer,inspection markings, etc. Unless you actually try to remove them. I wouldn't even know where to rent one here... plus that's $100 I can spend on something else Honestly my favorite part of these cars is the building, so I don't mind if some things take longer. Once they're done, I usually get bored with them.

Re: Ideas for removing undercaoting. [Re: Silver70] #1432100 08/30/13 09:10 AM 08/30/13 09:10 AM
Joined: Oct 2004 Posts: 68 Southern Michigan M mike_coates member
mike_coates member M Joined: Oct 2004 Posts: 68 Southern Michigan	For the guys the do steam cleaning, what does the equipment look like and where do you rent it? How is it used? Like a pressure washer or? Looks like a good idea for cleaning and removing undercoating. Thanks Mike '70 Swinger 340 '91 Dakota '72 Challenger '05 Ram

Re: Ideas for removing undercaoting. [Re: mike_coates] #1432101 08/30/13 05:21 PM 08/30/13 05:21 PM
Joined: Aug 2006 Posts: 62 Montana B BeeTX member
BeeTX member B Joined: Aug 2006 Posts: 62 Montana	Here it's just a Hotsy steam pressure washer, I haven't rented one but looked into it. My question is could you somehow do it without a rotisserie? Maybe jack one side way up on jackstands and remove wheels, then do same on the other side? Not ideal I know, but the rotisserie is where more expense comes.

Re: Ideas for removing undercaoting. [Re: BeeTX] #1432102 08/30/13 10:38 PM 08/30/13 10:38 PM
Joined: Dec 2007 Posts: 302 MG, Brazil v8punch enthusiast
v8punch enthusiast Joined: Dec 2007 Posts: 302 MG, Brazil	What kind of Steam cleaner will be suficiente to this work? I'm overseas and need a link or model to find someting similar here.

Re: Ideas for removing undercaoting. [Re: Silver70] #1432103 08/30/13 11:18 PM 08/30/13 11:18 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	The bigger the better when it comes to steam cleaners. They are expensive machines brand new, this one was about $4,000.00 retail but I bought it used for around $1,000.00. You want the temps capable of near boiling hot and 1-2,000 psi for good results. This model covered both just fine. 7833897-Hotsy(2).jpg (43 downloads)

Re: Ideas for removing undercaoting. [Re: ScottSmith_Harms] #1432104 08/31/13 08:01 PM 08/31/13 08:01 PM
Joined: Nov 2009 Posts: 2,177 ill D dennismopar73 top fuel
dennismopar73 top fuel D Joined: Nov 2009 Posts: 2,177 ill	We have 2 steam cleaners none of which will remove undercoating! If it is flaky it will remove the flaks , none of the hard stuck on product but if your having luck with it use it!

Re: Ideas for removing undercaoting. [Re: dennismopar73] #1432105 08/31/13 08:25 PM 08/31/13 08:25 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	It takes patience, you need to have the heat and pressure turned up full blast, adjust the tip to the thinnest possible point of water stream, and hold the tip close to the under coating long enough for the hot water to soften it. It may be a slow process in the heavier areas but it will remove it. I cleaned every single bit of it from my Duster and the rear wheel wells had a VERY heavy coating, took about 3 hours total.

Re: Ideas for removing undercaoting. [Re: dennismopar73] #1432106 08/31/13 08:43 PM 08/31/13 08:43 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: We have 2 steam cleaners none of which will remove undercoating! If it is flaky it will remove the flaks , none of the hard stuck on product but if your having luck with it use it! Mine is a 4 gal per minute machine at just 2000psi at 212+ degrees, it'll blow mortar joints out of brick buildings, it'll remove under coating. Thing is most people don't have access to or have never used a higher volume machine. Did you see my pictures in all the other threads? They tell the story. And someone mentioned about trying to do it without a rotissierie, which I don't think it could be done very easy if at all, because the wand is pretty long and you would not be able to shoot the car at every possible angle to get it all the way clean. This machine has a steam valve that can be opened and allows some of the water to recirculate and get to the steam level and shoots at a reduced pressure. I do the whole car with it set on high and then use the steam to loosen/soften the hard stuff and then turn it back to high and it'll blow away all of it. I have done several cars and it took about 4 hours to do the bottom and be completely done and have a spotless bottom.

Re: Ideas for removing undercaoting. [Re: Challenger 1] #1432107 08/31/13 09:03 PM 08/31/13 09:03 PM
Joined: Feb 2006 Posts: 1,179 Canada D demon super stock
demon super stock D Joined: Feb 2006 Posts: 1,179 Canada	I've tried many methods. One of the most effective for at home with next to no cost is this: on a rotisserie- using a bottle with a tip lid such as a gear oil bottle, wet an area about 10"x10" with gasoline. Light it with a barbeque lighter and let it burn. It will flame for about 10-15 seconds then go out. Then simply scrape and wirebrush while it's warm and it will clean it to the painted metal very nicely. BUT! Use your brain! Don't drip gas all over! Don't do this indoors! Don't breathe the smoke. Don't burn yourself or your car down. Etc etc. Don't be an idiot! With care this method works very well. Much faster than the propane torch

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