7/17/22
This week I got the front and rear skirts smoothed out enough with microballons / epoxy mixture to shot the first coat of primer.
I am using the Sherwin Williams sandable primer that builds up about 0.001" per layer. This stuff is really sweat. It goes on easy, sands well and produces a really smooth finish with 320 grit dry.
After first sanding, I found lots of defects in my fiberglass microballons / epoxy coat. For the final finish coat, I am going to shot over the primer with an Sherwin Williams aircraft paint, not so much to provide a finish painted surface, but rather to protect the primer and my final surface finish for the eventual aircraft painter. This paint and primer is compatible with the glazing compound one finds in the auto parts stores; making filling the pinholes and imperfections much easier and quicker.
For the windscreen, I squeegeed on a pure epoxy coat to fill the imperfections, but this didn't turn out so well. I ended up sanding most of the epoxy away to get it smooth again. The rear skirt I just smoothed with micro and epoxy, but I tried adding cab-o-sil to thicken it, and this was also a mistake. If I ever do this again, I will probably just do two coats of micro and epoxy; the first coat being thick to fill the big gaps, the second being thinner to fill the pinholes and remaining imperfections.
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