One of the hill billys that owned my truck before I did once sprayed in their own bed liner (DIY kinda thing) and looks like they never touched it up every year because the thing is completely torn up and looks like hell. I bought Dupli-Colors Bed Armor ($100) and can't use it until I can scrape up the rest of the bed-liner. Is there a better way to remove it than the way I'm doing; hands and knees with a chisel. Been at it for more than an hour and have hardly made any progress. I will try to use a power sprayer at work next week but would like to get this finished by Monday.