Have a lot of time for vitas helicopter sheet, you can get about 3 bats per metre, I have recently gone onto hammer edge sheets, bought from Adcal, only downside is the minimum order is 25 (but as I do repairs for the club It comes in handy most are Newberry bats with hammer edge anyway)
I feel the ball respondes better with them, personal choice.
Would like to try fibreglass sheets, buy I know there a bitch to take off!
As above, take it off across the face, if its stickers I just wizz a 120 paper over with an orbital sander, I cba to scrape it off etc.