Yes, it can be done... A few years back I was helping a friend re-open a big old 1,800 seat palace that had been closed for several years, and had been broken into, causing some minor vandalism... The screen was a gigantic silver surface plastic job with a couple of 6" tears, and also some red spray paint... He was all set to just replace it until he checked the cost... I suggested the following, and it worked... We first vacuumed the front and rear of the screen, then he backed up the rear side with a 4'x4' piece of plywood while I scrubbed the face with a scrub brush using a dishwashing detergent and water mixture... Rinsed it with clear water and let it dry... Next, we loosened the lacing in the damaged areas, and released the tension near the holes...We then applied patches made of white naugahyde (duck backed upholstery vinyl) with 3-M automotive weathersrip adhesive (the yellow vinyl kind similar to contact cement)... Again, he backed up the rear side while I rolled the face with a small wallpaper roller where the patches were applied on the rear... We let it dry overnight, and re-tightened the lacing... I heated a large darning needle with a Turner Torch and "burned" the perferations back through the areas where the patches were...Then, I used lacquer thinner on a rag to clean off the red spray paint, while he backed it up with the plywood, which of course also ruined the silver coating... Next, we wiped the entire face of the screen with lacquer thinner, which softened the silver coat, and somewhat softened the screen material, itself... While it was still tacky, we coated the whole screen with white Martin-Senor Automotive Vinyl Roof Color Coat, using a 16" roller... It took about a day and a half (of hard work), and the materials cost about $150, but a new screen was going to cost something like $8,000... The screen looked brand new when we were finished, and as far as I know, it's still in service... Not easy, but it can be done...