Author Topic: Clear coat over bare metal gas tank - any success?  (Read 16474 times)

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Offline johnny

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Clear coat over bare metal gas tank - any success?
« on: May 25, 2011, 01:46:36 PM »
An idea for my next project: I'm thinking of stripping the exterior of a gas tank down to the bare metal and clear coating it. Anyone had any success with this? Pictures? Any products you can recommend that will effectively prevent rust and hold up over time?
Thanks in advance.
1976 CB550K
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1974 CB550K
1972 CB350 Twin
1965 Lambretta
196(?) Honda S90
1975 Ford Bronco

Offline Bankerdanny

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Re: Clear coat over bare metal gas tank - any success?
« Reply #1 on: May 25, 2011, 02:53:10 PM »
Johnny, get Skonnie Boy to show you the rat tank on his ride. He let it artfully rust and then clear coated it.
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline johnny

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Re: Clear coat over bare metal gas tank - any success?
« Reply #2 on: May 25, 2011, 04:47:27 PM »
Johnny, get Skonnie Boy to show you the rat tank on his ride. He let it artfully rust and then clear coated it.
From what I've been told, even if you clear coat it immediately, it will "artfully rust" eventually - which is what I want to avoid. :-)
1976 CB550K
1974 CB350F http://forums.sohc4.net/index.php?topic=81781.0
1974 CB550K
1972 CB350 Twin
1965 Lambretta
196(?) Honda S90
1975 Ford Bronco

Offline nokrome

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Re: Clear coat over bare metal gas tank - any success?
« Reply #3 on: May 25, 2011, 05:37:36 PM »
forum member "paulages" cleared his bare metal tank, still looked really nice the last time i saw it
Funny thing about regret is...... its better to regret something you have done than to regret something you haven't done.

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Clear coat over bare metal gas tank - any success?
« Reply #4 on: May 25, 2011, 08:22:35 PM »
Clear powder coat
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline ColinMc

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Re: Clear coat over bare metal gas tank - any success?
« Reply #5 on: May 25, 2011, 08:38:48 PM »
I did an 86 FZ750 that way, stripped the steel tank down to bare metal, polished the heck out of it. Then cleared it. I used a good fast 2 part urethane clear coat, and never had any problems. Rode the bike for 6 years, sold it, repainted it for the new owner and it was JUST starting to get little tiny rust spiders showing by the rear tank mounting bolt...

The trick is if you do polish it, you have to CLEAN the tank with prepsol to get all the polish off before clearing it. But you need to clearcoat it RIGHT AWAY! Don't give it time to oxidize. Plus if your tank isn't perfect...you can't use filler on a bare metal tank or you'll see it obviously.
1976 CB750K - Cafe Project...taking forever
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Offline scottly

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Re: Clear coat over bare metal gas tank - any success?
« Reply #6 on: May 25, 2011, 09:31:15 PM »
I read about a protective coating in a car magazine, called "Sharkhide". It caught my eye, as I thought it might help preserve the nickle plating on my Seeley frame. I haven't tried it myself, but it might be just what you are looking for.
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Offline Hannibal Smith

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Re: Clear coat over bare metal gas tank - any success?
« Reply #7 on: May 25, 2011, 09:36:28 PM »
Hate to say it, but you might be a "day late, and a dollar short", this is like putting Eddie VanHalen racing stripes on your T-bucket................looks cool in 1985, but doesn't age well at all.
This is just my opinion of course!
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Offline Silverback

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Re: Clear coat over bare metal gas tank - any success?
« Reply #8 on: May 25, 2011, 11:22:29 PM »
Any clear is porous and will rust over time. How long? Dunno? A number of factors can play in. If you leave your bike outside the heat expands the paint. If it happens to rain during very hot days, rust will form faster. Ding it, rust. Scratch it, rust. Looks cool, but there are some very cool paints out now that mimic metals very well that might be an option.

Polished metals prolong the oxidation process so polished aluminum (not as susceptible to oxidation as steel) tanks retain their shine for a long time under clear.
« Last Edit: May 25, 2011, 11:24:58 PM by Silverback »
Chris
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Hinomaru

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Re: Clear coat over bare metal gas tank - any success?
« Reply #9 on: May 25, 2011, 11:57:57 PM »
To protect paint, clear coat, polished aluminum and chrome ... Meguiars #20 works very well and lasts for quite a while as compared to automotive type waxes. I use it on the CB750 and was first sold on this product when applying it to freshly polished brass to retard oxidation / tarnish. It's hard to find so I order it from Meguiars.  http://www.meguiarsdirect.com/

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Offline ColinMc

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Re: Clear coat over bare metal gas tank - any success?
« Reply #10 on: May 26, 2011, 06:28:56 AM »
Any clear is porous and will rust over time. How long? Dunno? A number of factors can play in. If you leave your bike outside the heat expands the paint. If it happens to rain during very hot days, rust will form faster. Ding it, rust. Scratch it, rust. Looks cool, but there are some very cool paints out now that mimic metals very well that might be an option.

Polished metals prolong the oxidation process so polished aluminum (not as susceptible to oxidation as steel) tanks retain their shine for a long time under clear.

Well there are a lot more factors they come into play as well...using a high end clearcoat and making sure you use enough of it will make a HUGE difference. Again I did a tank that lasted 6 years with no problems...and would have lasted longer. This was a bike I had when I didn't have a garage and rode it all year long in upstate NY...not in the snow though lol.

It's all in the preparation and making sure there is as little time as possible between cleaning the tank off and getting the clearcoat on it. I've had great luck with clearcoating both polished steel and aluminum on car and bike stuff.

If you do go through with this use a HIGH END speed clear coat. I can't stress that enough. Spraymaxx and Duplicolor stuff won't cut it here...I'm talking about stuff that costs over 100 bucks for a quart of clear with all the fixins....
1976 CB750K - Cafe Project...taking forever
1984 Honda MB-5 - MB-8 conversion in process
2001 Ducati 748 - Built 996 motor sleeper

Offline Silverback

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Re: Clear coat over bare metal gas tank - any success?
« Reply #11 on: May 26, 2011, 07:07:11 AM »
I agree! Prep is always king in painting. High quality clear for sure and a quick spray after prep. Fingerprints trapped under the clear would be a bad thing. I'm sure that, if done properly, it can last a good bit especially with a polished surface. I really like the look of toaster tanks. Dunno, for not too much more than painting a painter for supplies and time, chroming might not be a bad option, but just like everything it can get damaged or begin to degrade without proper maintenance.
Chris
"It's hard to define soul. You get it in art. You get it in music, and occasionally you get it in machinery."
78 CB750F racer
78 CB750F stock
75 CB750K Baby Blue Sold (She was a great bike!)
71 CB750K (rusty rod)
77 cb550F Sold :(  Bought it Back :)
Basket case 73 CB750, 77 CB750F (Building now)
01 Aprilia Falco
76 kz400
96 BMW K1100LT