biggest mistake I see here is you practiced on your plane that you care about. as said here IT TAKES PRACTICE & some applied knowlege to use the materials . leave the fancy tricks,( like covering a wing in one piece) for the experienced. obtain some scrap monokote from others or the least popular color cheap from the hobby shop and practice on an old airframe or someones crashed model.the sock helps a great deal in keeping down scratches. there is a tendency to rush things , especially corners . you must think ahead , PULL TIGHTLY (USE GLOVE ) and allow the heat to do the work. other coverings ie, ultra cote , ora cover . do not melt as easily. there is a fine line between tight & melting as you found out. some times you may have to live with a few minor wrinkles than a ruined job. covering WILL NOT hide poor workmanship. also dont be afraid to patch . however when you do ,replace whole areas not small holes as it will be far less visible.