Disassemble all parts and deburr all #30 holes, all the rib and spar edges, and the edges of all the lightening holes. If the powder coated hinge brackets will be painted later scuff them with a scotchbrite pad until the gloss is removed.
My notes:
I don't like sanding. I'm sure glad I went with a metal airplane and not fiberglass.
My lovely wife and partner picked me up a Dremel 3000 from HomeDepot and the parts kit they had on display.
I have tried several different items the sanding wheel seems to work best but I didn't like the finish so I went with the grinding wheel next and still didn't like the finish so I used a sanding block
