Join Date: Mar 2007
Thanked 134 Times in 130 Posts
The patch on the Isuzu has been on for 8 years and was cut 2 inches overlap.
The bed has an innerliner that collected trash,I pressure washed the inside and the liner panel and treated with rust converter (Ospho). Then I buttered a little foam on the overlap and filled the space between the two panels.
I stuck a couple of welding magnets on to hold things while the foam set up.
A coat of bondo, but it had pinholes in it so I covered that with Microlite Filler.
Both products are permiable and so will let some water through to start the rust agin. The marine paint is the next step down from automotive paint, is water proof and if the color is only close a light coat of touchup paint will change the color to match after it cures.
I use the 1 part foam in a can to fill spaces on the hood that the paint does not get to, the high humidity will make lacework out of the lead edge of a hood but the foam covers the back so the water can't get in and if it is chipped from the front the foam glues the hood and liner togather. It also cuts panel drumming and engine noise.
93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
81 Isuzu /C223na, 5spd