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11-11-2012, 09:51 AM | #1 |
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Temporary paint for fender
I am restoring a '31 Coupe and have 2 front welled fenders that were sand blasted several years ago and are starting to rust. I would like to use them temporarily until I have time to finish restoring the plain front fenders that will be permanent.
I would like to paint the welled fenders with something that can be easily removed by some future restorer. I have some black acrylic lacquer that might be suitable, and I could use some rattle-can primer-filler that is a soft paint that might be easily removed, both with a future sand blast. Does anyone have a better suggestion other than completing the restoration of the plain permanent fenders? |
11-11-2012, 10:24 AM | #2 |
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Re: Temporary paint for fender
Use a DA with 80 grit, or use something to scrape away the rust that is there, then prime them and they should be okay till you or someone else gets around to them.
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11-11-2012, 11:33 AM | #3 |
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Re: Temporary paint for fender
Many primers are porous to water. Be sure you get a water proof primer of put on a quick top coat.
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11-11-2012, 02:22 PM | #4 |
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Re: Temporary paint for fender
Wash the fenders with OSPHO, follow instructions and prime with epoxy catalized primer, top with a few coats of black lacquer. the OSPHO will treat the rust, the epoxy is not porous, and the lacquer sands easily for further topcoating. Don't sand with 80 grit unless there is a good reason for doing it. I wouldn't even sand the bare metal with anything more coarse than 150 grit unless there was heavy rust. Light rust discoloring that happens after sand blasting will go away with the OSPHO treatment.
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11-11-2012, 04:46 PM | #5 |
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Re: Temporary paint for fender
I use 36 grit on my freshly blasted surfaces and have done so for 35 years.
Never with a disc sander, only an orbital. |
11-11-2012, 05:17 PM | #6 |
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Re: Temporary paint for fender
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11-11-2012, 05:23 PM | #7 | |
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Re: Temporary paint for fender
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11-11-2012, 10:45 PM | #8 |
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Re: Temporary paint for fender
For heavens sake stay away from lacquer. Modern urethane paints will lift and bubble it and make a heck of a mess for the next person. I am dealing with this very issue right now on a '61 Rolls I am working on for a customer. They will have to be blasted all over again.
They should have had the Ospho (phosphoric acid) treatment right after blasting and if so, they would not have rusted at all. Use it now by spraying it on and then play the flame of a propane torch lightly over it to catalyze the reaction, then wipe it off. Do this several times until you have no more rust color on the rag. This means all the rust has been converted to iron phosphate which is very stable and will not rust; and is the best surface upon which to apply other products. If lacquer were so good the car companies would still be using it.
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11-11-2012, 11:03 PM | #9 |
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Re: Temporary paint for fender
I have shot catalyzed urethane topcoats over lacquer and never had a problem. The idea of using lacquer is that a few passes with a sander and it is gone anyway, I wasn't advocating 20 coats like old show car jobs.
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11-13-2012, 05:53 PM | #10 |
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Re: Temporary paint for fender
What ever spray can of primer you use, just get a can of clearcoat in a spray can and you will be ok till you get back to your regular paint job. Primer will absorb moister and the clear will prevent this from happining..done it...works for me!!
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11-13-2012, 06:10 PM | #11 | |
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Re: Temporary paint for fender
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