Lol I've used that stuff as well. Any 2 part resin isn't the most easy thing in the world. He merely said "Finishing Resin" which, in the guitar world, usually implies polyester resin....
Anywho,if that is what you are using,
Some advice
- Tape the sides with electrical tape. I mean the ENTIRE side as well even the bottom edge, not just next to the top. After an hour or so when it starts to get somewhat tacky, then remove the tape.
- use THREE cups, not just mixing in one. pour your hardener in one cup, resin in the other. Pour the RESIN into the hardner (not the other way around). Stir SLOWLY (you have a lot of time to work with this stuff) for about 2 minutes. Then pour the mixture into a third cup but do NOT scrape the sides of the cup to "get it all out".
- use a foam brush to apply it, dont just pour it on, or you will be fighting air bubbles. Put on 2 coats. I know the one coat will appear to be super thick, but you will be burning through that faster then you'd think. Its easier to thin out 2 coats then it is to re-sand and redo the whole damn thing lol.
Finishing is the same as any other clear coat. Wet sand, polish, wax. Fortunately if you have a thick coat of resin on you can use a power sander to level (much easier!), and go from there yielding great results.
Also, once you're finished, lemme know, theres some more details to work out so you dont crack the finish.