SIG is thin, stinks, and is slow to dry. Brodak is thicker, needs more thinner, does not smell up the house nearly as much, and dries much quicker. Guess which I would recommend! You will need to thin it with at least as much thinner as dope even for brushing. Use only Brodak thinner with the Brodak dope. They are made for each other and are a team. That is what makes it work.
If you are spraying dope, spray light coats at first. If you brush the dope on open bays covered with silk or silkspan, brush from underneath, turn it over and brush from underneath again. This keeps the drips from dripping through and making an ugly mess where you cannot get at it.
Cover everything with silkspan--all the wood surfaces--everything. Brush on a mixture of talc and dope (or your favorite filler). Let this dry, sand it smooth, add your colors, sand this sort of smooth, spray on your clear coats, sand this very smooth. Buff, polish, shine, and sit back and admire your handiwork.
See, that wasn't so hard, now, was it?
Leonard Neumann