: Just tried using some cab-o-sil to keep epoxy from getting runs in it on the
: final fill coat.

Big oops, cabosil is like sand,,1/12 is like finishing your hull with epoxied sand,,,it will be hard to sand,,,the cabosil will dull the finish. How to not get drips? use less epoxy, more fill coats. But either way if you are using cabosil then mix it in well so there aren't those balls of dust in the mix. Wear a mask. I would think the maximum amount of cabosil used to not cause problems might not be enough to prevent blatant drips.