Re: Gas Tanks - To Paint or Not to Paint? What do you do?
[Re: burdar]
#1200979
03/21/12 11:08 PM
03/21/12 11:08 PM
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Joined: Feb 2003
Posts: 2,304 WI
RestoRick
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WI
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Re: Gas Tanks - To Paint or Not to Paint? What do you do?
[Re: RestoRick]
#1200981
03/22/12 11:36 AM
03/22/12 11:36 AM
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Joined: Oct 2004
Posts: 1,060 Ball Ground GA
TrueTripleX
super stock
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super stock
Joined: Oct 2004
Posts: 1,060
Ball Ground GA
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Quote:
RPM
Out of curiosity, what would you paint this with? I have a older, but solid tank that could use some cosmetic help before it goes back on the car. Any suggestions Rick as to how to dress it up?
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Re: Gas Tanks - To Paint or Not to Paint? What do you do?
[Re: TrueTripleX]
#1200982
03/22/12 12:21 PM
03/22/12 12:21 PM
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Joined: Feb 2003
Posts: 2,304 WI
RestoRick
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You can't paint over RPM. (I don't think that's what you meant, but in case anyone does ) A fine metallic silver paint is one option. Another suggestion would be the PPG Vibrance Collection's "Liquid Metal". I haven't seen it in person, but it looks like it would have that bright tin look. The most authentic look, would be to have the tank tin plated. Rick
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Re: Gas Tanks - To Paint or Not to Paint? What do you do?
[Re: chromedome426]
#1200988
03/22/12 07:00 PM
03/22/12 07:00 PM
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Joined: Nov 2003
Posts: 3,438 Dandridge TN
Dabee
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master
Joined: Nov 2003
Posts: 3,438
Dandridge TN
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Quote:
Has anyone ever tried spraying clear coat on a new tank to keep it from rusting? Would it even stick to the bare metal?
Yes, I clear coated the new tank I installed in my 69 Bee with POR 15 clear. That was 21 years ago and the tank still looks new.
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Re: Gas Tanks - To Paint or Not to Paint? What do you do?
[Re: RestoRick]
#1200989
03/23/12 12:03 AM
03/23/12 12:03 AM
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Joined: Mar 2011
Posts: 1,655 Cut and Shoot, TX
kentj340
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Quote:
The most authentic look, would be to have the tank tin plated.
Gas tanks were and are made of terne sheet, which is cold rolled steel sheet hot dipped in an alloy of lead-tin. Originally it was 80% lead, 20% tin, the recipe for solder. More recently the lead has been replaced with zinc, in a ratio of 50% zinc, 50% tin, according to Wikipedia. But ASTM A308, "Standard Specification for Steel Sheet, Terne (Lead-Tin Alloy) Coated by the Hot-Dip Process" still exists.
It says, "This specification covers sheet steel in coils and cut lengths coated with lead-tin alloy by the hot-dip process. This material is commonly known as terne and is used where ease of solderability and a degree of corrosion resistance are desirable. It is especially suitable where resistance to gasoline is required."
I'll bet Chrysler Corp gas tanks were made of 80% lead-tin in the muscle car days. More recently the Canadian gas tank maker Spectra says they are using Ni-terne sheet, which is steel sheet flash coated with nickel before hot dipping in terne metal, but they don't say what alloy of lead-tin (or zinc) is in the terne metal. I believe most all the new repro tanks available on eBay, Quanta, etc. are made by Spectra.
As far as appearance, the original tanks were bright, bare metal, just like the new repro tanks. But over time, any alloy of lead-tin (or zinc) will darken with exposure to the atmosphere, so a preservative like RPM before installation makes sense to keep the bright bare metal look.
You can help brighten old lead or lead-tin by using a polishing powder wetted with vinegar on, for example, gas filler tubes. But don't do this on spangled galvanized or zinc coated steel - it destroys the spangled appearance making all the spangles the same metal color, rather than different shades of silver/gray. If the galvanized is not spangled, or you don't care about the spangles, this method will uniformly brighten it. Then, of course, it will darken again, if you don't put some kind of preservative on it.
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