I also used thinned 30 minute epoxy (about 3:1 ratio of epoxy to alcohol -- Denatured best / 99% Isoproply fine). Covering does not stick to epoxy well, I would do the little trim around the nose with an 1/8th overlap into the engine compartment. Use an emery board (finger nail file) to lightly rough up the 1/8" that is in the compartment. Fuel proof the entire compartment with thinned epoxy overlapping the roughed up covering that overlaps.

I have also found that if you want the compartment to be roughly the same color, after applying epoxy you can use Dope (usually available in a close color) over the epoxy. You can get little bottles for a few bucks from your LHS. I usually do not try to match color but will often use flat-black inside the compartment.

But make sure you use a fuel proofer that will not only adhere but almost become part of the wood. Polyester resin also works well -- but man does it smell! Don't rely only on covering or your wood will suck-up fuel. The next thing you'll know is that your firewall has come loose. This is a very very bad thing to happen in flight!

By the way, your plane look great!