Clean it good and rough up the areas to be filled to provide a good surface to bond to. Lay the filler in carefully working out air bubbles and smoothing as best you can. let cure for a few days. block sand to desired finish. Final sanding at 600-800 grit wet should allow th finish to lay on very smooth.
Heres where you need to check if your planning on a heat cured finish coat do a test The temps to cure the finish may affect the epoxy also.
A good place to practice engraving, might make those rust area look like they belong there.
Dang it John! I love this answer!!!Originally Posted by John Taylor
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That's not just rust - those are craters. They have to be filled in. They're deep enough to be a concern as to the integrity of the barrel metal.
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