I glassed my fuse which is mostly flat sided ( Fokker ) and
sanded through in several places. Should I patch with more
glass or flow on some resin in the bare spots. I thought I was
watching the primer but maybe listening to the music.
Ralph

Putting a patch on the sand through will leave you a high spot. You'll be better off to fill the low spot. Are you going to fill the weave or leave it to show through the finish coat. Fokker what? WWI plane or otherwise? If you plan to fill the weave then I'd suggest you fill the sand through at the same time you apply the finishing resin but add some filler to the finishing resin to help build the low spot. Talc does a good job and won't make the area to stiff to sand.

Thanks John, D VII combat size. I guess there is really not a low
spot but a soft spot I was thinking I might just brush a little
resin on those places and lightly sand before the next coat of
primer. the weave mostly filled but I really don,t care one way
or another since this isn't museum scale.

The primary purpose of the glass is to provide a stable base for paint. A line (if for example, you sanded too much over a spar or rib) of exposed area might allow the developement of a crack in the paint over a long period of time. Covering it with a new layer of glass would prevent it from becoming a problem.
If the spot is small, I would just brush a little epoxy over it. If it was much larger than say a nickle, or a thinner longer line over 2" or so, then I might add a small patch of glass. I can't say these size guidelines are right or wrong, it's just what I would do.

Scott

Thanks, I was just mixing a small batch to patch with.
R