The white coat is some sort of oxide. If you ask anyone who's had to actually clean some older bunkers we hate the stuff.
Basically, you're best off brushing it with some nice and strong dish soap and a harder brush.
You may call it fat, I call it bounce padding.
If I say "the safety frame claim is bull****" I'm not ripping on PE, the SL8R is my favorite gun EVER. If I say "DMs are overpriced" it doesn't mean Dye is a bad company, I want an NT11 in the worst way.
However, when I say "The Vapor is overpriced and not very good" I mean it. I won't have one unless it's cheaper than what I can get a G5 or Proton for or free.