Sorry, this may be off the subject of Plastic Film coverings, but could somebody please explain what I'm doing wrong when I dope tissue over a balsa sheeted surface and get lots of little wrinkles. I've tried 'stretching ' it over the surface while doping round the edges first then doping the rest to try and shrink it, but still those little wrinkles.
They all seem to 'lay' in the same direction ?
Thank you for your help.