Kargo,I don't know of a thread.What I used is coverite fabric but I don't like it a whole lot,it doesn't go around curves to well.My next fabric airplane I will try to use Sig koverall,I think thats what it's called or you could go to a fabric store and get lightweight fabric for making dresses,it can be ironed down using a coat of special paint on the airframe or using dope.Good luck,I'm sure someone with more experience will be more helpfull then me.As far as giving it another coat of clear I gotta see how much more clear I have,you only use a small amout of thinner for it so you the paint don't go to far,I only got 1/2 pint of each.If worse comes to worse I can live with it the way it is.