forphorty
Well-Known Member
Weld thru primer is not very durable. Use it only where you are welding. When you are finished, wipe off the excess with laquer thinner. The primer close to the weld will be baked on and will not wipe off with thinner. Coat bare metal with epoxy primer or self etch primer, then topcoat. I would not use undercoating on bare metal. If some areas are inaccessible/difficult to reach after installation, prime them before installation with epoxy. Tape off the areas to be welded before shooting epoxy, then untape and apply weld thru primer on those areas.