Here's the method I use to ensure that I get good results with epoxy top-coat. I use Flex Coat Ultra V finish, but some guys on here have said that Flex Coat and E-tex are about the same so it should work with Envirotex as well as Flex Coat.
This is actually based on Fatfinger's epoxy tutorial on this site but I've modified it to fit my lure-building methods.
Anyway here it is:
What you will need:
Epoxy finish (NOT Devcon; it's a 30 minute epoxy and so it will set up to fast to use this method)
Epoxy syringes
Mixing bowl (preferably foil) with a lid or something to cover it with
Mixing stick
Heat gun (a hairdryer blows too hard and isn't hot enough)
Epoxy brush
Timer or stopwatch (this isn't necessary but it will make timing the mixing easier)
Note: I find that this method works best with amounts of epoxy from 6cc's to 10cc's. Any larger and it may not get mixed thoroughly; any smaller and it really isn't worth the effort.
1. Wash your hands to remove any dust.
2. Wipe down the mixing bowl and stick with Isopropyl alcohol to remove any dust. Even the smallest speck of dust can ruin the finish.
3. Draw up equal amounts of resin and catalyst. It may help to heat the parts with the heat gun, as heating thins them slightly and makes the epoxy flow better.
4. Squirt the finish into your mixing bowl, heating each part as you do. Heating the epoxy makes it a little easier to mix as it makes it more liquid.
5. Start mixing. Mix for three minutes, heating it every once in a while to pop the bubbles that form. Make sure you scrape the sides of the mixing bowl with the stick. At the end of three minutes heat it again, but don't overheat it. Place the lid over the mixing bowl and let it sit for ten minutes.
6. While the epoxy is setting, wash your brush with soap and water. You don't want any dust in your finish, and washing the brush will remove most of the dust.
7. At the end of ten minutes, remove the lid and mix it again for one minute, heating it occasionally. Then heat it again and let it sit for five more minutes.
8. You are (finally ) ready to coat your baits. You can use the heat gun to pop bubbles on the baits, but make extremely sure not to overheat them. To much heat and the paint underneath the epoxy will bubble. Once your baits are coated, hang them to dry on whatever you normally use.
9. Clean up (I'm not very good about doing this part ).
That's the technique I use, and if it is time-consuming, I haven't once had problems with the epoxy not curing fully since I started using it.
Ben