I haven't used silkspan in a long, long time, but continue to use dope on almost all my models. I transitioned to silk when I finally got a real job and could afford it, but in the late 70's, I started using dacron - either the Sig Koverall or the Stits Poly-Fiber. I think that if you will try either of those products, you will really like the way they apply. There are some good instructions on the Stits website if you have questions about attaching the fabric.

I agree with the comments about finish quality on a trainer. I usually just go with two coats of nitrate, two coats of color butyrate, and a coat of clear butyrate for a trainer. Keep 'em plain and light - Makes for a better flyer and an easier repair.