Well, it sort of depends on where you are adding the Epoxy. I sometimes use a toothpick to put it in corners, or some otherwise inaccessable place, or just glob it in, like in goining a wing and spar together in an ARF wing.

Sometimes, it also works to thin it out with Alcohol to get it to run smoothly, as in the engine compartment when trying to fuel proof it.

Where in particular do you want to apply Epoxy?

CGr