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D-Box surface coating

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ULF

Well-Known Member
Joined
Oct 24, 2015
Messages
58
Location
Vienna , Austria
Hi,
I have bought a halfway finished project of several ULF-1 s. One is pretty much ready for cover, except the wings are not finished yet. Only the D box is built. the ribs are there, but have to be glued on yet, as well as the aileronspar.
Now I noticed, that the inside of the D box was obviousely not surface protected. Only the forward ribs in it are. Every other rib is made of styrofoam, but has a 2 inch diameter hole in it.
According to the plan the 1mm plywood sheeting as well as the sheer web plywood that is on the front of the spar, inside the d- box, should have been coated except where the glue comes.

First I would ask what type of paint should I use? Is it at all necessary to surfaceprotect the inside ? Can I use thinned 2 komponent epoxy, or some mineralspirit based paint ?

And then how to apply it ? I could insert a long aluminum tube with a very fine spray nozzle in front, and mist rather than spray, using air pressure.
Or on a calm summerday I just place the d box vertically and cook some mineral spirit varnish so that the smoke passes through the d box like in a chimney, kind of fuming ?

Thanks guys,
Johannes :)
 
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