Some of yoose guys may already use this stuff but if you haven't, you might want to give it try. For years I've been salvaging every tiny scrap of sandpaper because plastic and paint loads it up so fast. I bought some Norton 3X paper at Home Depot a few weeks ago to sand a work table I was staining and I finished the entire thing with the same piece that I started with. Didn't load up at all. Has the same effect on plastic. The grit is very consistent too. It cost a little more but a pack should last you for years!
Hate to sound like a commercial- just thought you'd like to know.
fish