Originally Posted by herjazz
One thing I do is use painter's tape (3M Blue tape, can get at Home Depot, etc.) and tape up the area around the part you are filling. This tape is non-sticky and comes right off. Then do your P-tex job and scrape. That way the extra stuff doesn't go on your board, but on the tape, so after you peel off the tape, the rest of your board is clean...
I didn't know that, thanks!