As someone who makes most of his own tools, belts are one thing I'd rather buy. I too, wear full face mask when grinding and sometimes, when doing heavy turning/milling. Don't write off good ole McMaster. They sell "generic" alum oxide Nortons in up to 320 grit, very inxpensively and those are nice belts. And when and where it matters, I use some ceramics, Regals & co premium belts I have.