i use Koverall and i apply it with Nitrate dope. (Stix-it works too, i just like dope)

anyway, once applied, i start out with my iron (don't use a heat gun as it shrinks unevenly) set to 225* to shrink it.........if it needs more heat then go up in increments. 2 coats of nitrate thinned 50/50 brushed on will seal the Koverall and will also tighten it up a bit more. you don't want to go tighter than necesary. Koverall has the strength to turn some structures into a pretzel. just shrink it enough to take up the slack. (no sagging between rib bays)
once you have sealed it, you can put anything on it........
paint from Chip Mull (F&M Enterprises) will give you all the color you need, and it's a product that people rave about.
Chip's website,

http://www.stits.com/store/index.html

below are a few pictures of my projects covered with Koverall.
the Nieuport 11 has a pretty fragile framework (especially the tail) but handled the Koverall quite well.