This is a related question. I just finished the rough fabrication necessary to fit my skirt to the canopy. It involved slicing the skirt in several places in the back and then filling gaps with epoxy thickened with fiberglass flox. Then, I laid up one layer of 9 oz. cloth on the outside and two layers on the inside to reinforce everything. Now, the skirt fits well, but there are some waves on the surface from all of the fabrication and layups.
I am at the point where I want to "skim coat" the skirt to smooth everything out, but I am not certain what product to use. On my old 1963 Triumph Spitfire (in high school) the trick product was bondo, but that hardly seems airworthy. I am using the West epoxy process, which seems to be working well for this newbie. Do I thicken it with the same fiberglass flox (but that seems too course) or the microbaloons I purchased from Aircraft Spruce.
Thanks in advance for your advice.