Tuno wrote:

I am shocked, SHOCKED I tell you, that some people replying to my OP
suggest that power tools might harm my glider. Really?! Next time I'm
at the dentist, I'm going to tell him to crank that sucker by hand!

Difference is, your dentist most probably has had several years of
serious training.

This hard wax thing *is* tricky. It must get warm to smoothly fill those
tiny holes. But get a tad too warm, and you destroy the wing. It *has*
happened. Stay two seconds too long at one place and the surface is
brown and you'll never know how much the structure has weakened. Let
that machine get out of control for half a second and you'll have
wonderful waves in the surface. You can do a lot of harm to a previously
perfect wing. No problem for the pro, but since you had to ask, chances
are your not a pro.

So I repeat my first answer: If you have to ask, don't do it. At least
don't do it without the help and supervision of a skilled person. Of
course, it's your glider and you can do what you want.