Treating welds etc. on inside of blind areas to prevent corrosion

C

CJK440

Promoted Users
Any suggestions on how to treat welded areas on the inside of structures that cannot be reached with tooling? I just installed a rear valance portion butt welding it to existing steel. Of course I was able to grind down and epoxy the outside but the inside has to remain as-welded with charred epoxy, smoke residue etc., there is probably some surface rust on the inside of the original steel also.

I can get in there thru holes and gaps with an extension tube on a spray can and was thinking of just hosing it down with fluid film after the project is done. Is this a valid way or are there other products that I can use.
 
It wouldn't hurt to try spraying as much epoxy in where you can. After that cures for a while, and the paint work is done, then it's time to think about cavity wax, such as Amber Coat. The fluid film would make a great final line of defence, because it fogs the whole area and migrates to places that other products may not be able to reach. I prefer Wool Wax to Fluid Film, because it is harder to wash off and it doesn't smell nearly as bad. However, you pretty much have to heat it for it to spray, and fog the way that Fluid Film does.
 
Is Amber Coat a generic term for the amber cavity waxes offered by 3M, Transstar etc.?

Also to add this is a musclecar resto, it may get washed 3-4 times a year and sit in a garage during wet weather/winter.
 
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