Polyspan Covering
Pete,
My findings exactly. You have to use the covering iron to coax Polyspan around compound curves and wingtip bows, and when you do it conforms as good as or better than Econokote/Towerkote (which is my favorite plastic film, btw).
I have not yet tried dying Polyspan with analine dye. I like the way it looks au naturel, but when I want color accents and graphics I dope down some colored tissue, applied damp. Polyspan also likes colored dope from the spray can. Use vinyl tape for masking.