2 part epoxy

Cribbs74 wrote:No problem, to be more specific denatured alcohol. Acetone works as well. Both of these will weaken the epoxy somewhat.

The very best method would be heat. It doesn't weaken the bond and it flows like a thin syrup. You could use a heat gun or a double boiler.

andrew wrote:I have always coated firewalls and other areas that are exposed to raw fuel with epoxy.  I use 30 to 45 minute cure times because it gives more work time and I think the longer cure epoxies are less brittle than the 5 minute or instant epoxies.  That said, I prefer heat for thinning.  After applying to the areas, I use a monokote gun to warm the epoxy to the point it begins to run slightly.  This lets me move it over the part and into the crevices and joints where necessary.  If it is a plywood firewall, the epoxy will actually begin to soak into the wood and when set, leave a smooth, glass like finish.

RknRusty wrote:I just use a paint brush and dip it in acetone, then pick up the epoxy with the dripping wet brush and slather it on.

Or, a couple of heavy coats of Minwax polyurethane goes on easier and is pretty super fuelproof too. The pint cans are cheap. For LG holes, screw/bolt holes, etc., I also use a toothpick or a little dental cone brush(meant for flossing between the teeth) dipped in polyurethane too. It really soaks in good inside those bored holes and doesn't foul any threaded inserts or t-nuts as bad as epoxy can.
Rusty