Surface Primer?(With a Pic.)

Posted By: racerx

Surface Primer?(With a Pic.) - 04/01/11 07:32 PM

I sprayed surface primer last year just b4 winter and i thought that it sprayed

fairly well 4 the first time.Well i was wrong

When the primer dry it has that alligator texture to it and wondering what procedure would be best to eliminate this rough texture.Can i just sand with a say (320)then final sand with a (400)

r what will b the best way of tackling this i thought I'll ask here on Mo parts b4 i go any farther.Any help would b greatly appreciated.Thaxx

Posted By: Sasquatch4406

Re: Surface Primer? - 04/01/11 07:36 PM

id say youd have to get rid of it. strip it off with 80 grit

Posted By: 1_WILD_RT

Re: Surface Primer? - 04/01/11 07:37 PM

Surfacing primer is meant to be block sanded... It's better if it lays out smooth but your gonna be sanding anyway...

Posted By: racerx

Re: Surface Primer? - 04/01/11 08:36 PM

Quote:

Surfacing primer is meant to be block sanded... It's better if it lays out smooth but your gonna be sanding anyway...

Thaxx's 1 wild r/t

that's what I'm thinking

I'm trying 2 get photo bucket 2 host a pic but

it's not happening but like said it laid down fairly well i think with no runs,just has that rough texture.

Posted By: racerx

Re: Surface Primer? - 04/07/11 04:48 PM

? anyone has ever prep b4,

using a DA sander B4 top coating.Or can it be done? Thaxxx

Posted By: Aero426

Re: Surface Primer? - 04/07/11 05:52 PM

A DA sander will make the surface smooth, but it won't level it. You need to block sand. There is no free lunch with body work.

Posted By: Challenger 1

Re: Surface Primer? - 04/07/11 07:00 PM

Quote:

A DA sander will make the surface smooth, but it won't level it. You need to block sand. There is no free lunch with body work.

Yup, I'd start with 120-150 dry and get it level again.
You used either the wrong reducer for the temp or the wrong proporation when you mixed it. Got to have a pretty good tip size to spray surfacer, 1.8-2.2 or so.

Posted By: racerx

Re: Surface Primer? - 04/07/11 08:57 PM

Thaxx's

That's what i was thinking to use a DA to smooth it then follow up with a blocking of #400.

Posted By: Challenger 1

Re: Surface Primer? - 04/07/11 09:40 PM

Quote:

Thaxx's That's what i was thinking to use a DA to smooth it then follow up with a blocking of #400.

Wrong... You will never get it right that way.

Posted By: racerx

Re: Surface Primer? - 04/07/11 11:41 PM

Quote:

Quote:

Thaxx's That's what i was thinking to use a DA to smooth it then follow up with a blocking of #400.

Wrong... You will never get it right that way.

So what will u recommend?your help is greatly appreciated

Posted By: Challenger 1

Re: Surface Primer? - 04/07/11 11:49 PM

To get the body straight your'll need to block it with something courser than 400. I'd block it down dry with some 150-220 and then reprime and see where I'm at before wet sanding with 320-400.

A DA will make a mess unless your really good with it or just want to strip it then whip out the DA.

Posted By: racerx

Re: Surface Primer? - 04/08/11 12:44 AM

Finally got photobucket to cooperate

here's a pic so u can possibly see what's going on

Posted By: None2Slow

Re: Surface Primer? - 04/08/11 01:10 AM

Do you want quick, or done right? Gotta block it.

Posted By: Aero426

Re: Surface Primer? - 04/08/11 01:10 AM

It looks normal to me. Take a black spray bomb and mist a light guide coat on. Then start block sanding grasshopper. On your first prime coats, you are going to sand most of it off anyway.

Posted By: Mopar_Country

Re: Surface Primer? - 04/08/11 01:13 AM

Quote:

It looks normal to me. Take a black spray bomb and mist a light guide coat on. Then start block sanding grasshopper. On your first prime coats, you are going to sand most of it off anyway.

I was told the same thing by a body man with 40 years of it under his belt. Works good.

Posted By: AdamR

Re: Surface Primer? - 04/08/11 01:14 AM

Spray it with guide coat and start blocking with 180.

Posted By: RTSrunner

Re: Surface Primer? - 04/08/11 02:37 AM

Quote:

Spray it with guide coat and start blocking with 180.

^ Exactly,block it and use it as intended to fill the low spots and surface imperfections.Mix more surfacer and add some slow reducer to help the primer flow.It will give a smoother application when you spray.It will also be easier for you to sand with 360 to 500 grit before sealer or paint.final sandpaper grit is dependent on the type of paint to be applied.What brand and type of primer-surfacer are you using?Epoxy,2k urethane,or other?
RT

Posted By: crlush

Re: Surface Primer? - 04/08/11 02:48 AM

looks like primer to me, start blocking with 180.

Posted By: racerx

Re: Surface Primer? - 04/08/11 02:54 AM

I'm useing that Summit 2k urethane primer surfacer. Thaxx

A few have mention to block with 180.Would that course of a grit be to rough?Or do i need to follow up with say 320-400.Sorry 4 so many ?,but I'm taking time off work to hopefully get this finish all uall help is greatly appreciated

Posted By: Challenger 1

Re: Surface Primer? - 04/08/11 03:11 AM

Nope, it(sandpaper) has to be ruff so it cut's and get's the panel straight, it's the only way. If you go to fine right away, it will never get flat and will be all wavey.

Block sand in a X shape and do it for hours, many. Get your self some durablocks and get busy. I have also used homemade blocks to sand with. It don't have to be Durablocks, but they work so nice.
Guide coat is a must also. Try it, your'll see.

here they are with a heavy guide coat before blocking.

210 hours worth, to this.

Posted By: ahy

Re: Surface Primer? - 04/08/11 03:19 AM

The 180 (or 150) will smooth and level it. Its best to sand the first coat thoroughly with aggressive grit, re-prime and then hit it with 320/400. If you aren't re-priming the work up to 220/320/400... but by then you will be through the first primer.

Posted By: racerx

Re: Surface Primer? - 04/08/11 03:41 AM

I see Thaxx's guys

Posted By: challengermike

Re: Surface Primer? - 04/08/11 03:58 AM

I just use a paint mixing stick(a wood one)So block it with 180,then reprime it,and then block it again this time with 320-400.It takes along time but its the right way to do it.If you do the final sanding with wetsanding paper get a rubber squeegee to dry it off between sanding.That way you can see quickly if you missed anything.

Posted By: racerx

Re: Surface Primer? - 04/08/11 12:22 PM

Man....u guys r making what to

This body work is to tedious.......Thaxx's 4 the help everyone

Posted By: AdamR

Re: Surface Primer? - 04/08/11 12:35 PM

Sand and sand again, I go 180. 220, 320, 600 wet, 800 wet.

Then paint and clear, back to sanding 1500 wet, 3000 wet.

Posted By: Challenger 1

Re: Surface Primer? - 04/08/11 12:43 PM

Quote:

Sand and sand again, I go 180. 220, 320, 600 wet, 800 wet.

Then paint and clear, back to sanding 1500 wet, 3000 wet.

Yup, you will get some toned arms by the time your done.

AdamR, are you the same Adam that helped me paint my car in 2005? This Adam had a body work website.

Posted By: AdamR

Re: Surface Primer? - 04/08/11 12:55 PM

Possibly, I had a web site up for a while. Im one of those odd people who love blocking, LOL.

I did a lot of blocking on a few members cars. I did Big Inch Motors Barracuda and 340Swings Dart.

Quote:

Quote:

Sand and sand again, I go 180. 220, 320, 600 wet, 800 wet.

Then paint and clear, back to sanding 1500 wet, 3000 wet.

Yup, you will get some toned arms by the time your done.

AdamR, are you the same Adam that helped me paint my car in 2005? This Adam had a body work website.

Posted By: Challenger 1

Re: Surface Primer? - 04/08/11 01:06 PM

Car looks great!

Thanks if it were you, you helped me a ton. Yes I like blocking too, something about it. Get in a zone and sweat your azz off, it's great!