Jane,
I know what kind of makeup your talking about, but I do not know if it may be harmful... I do know that I think about that kind of stuff all the time. Weve been remodeling our house for 2 years now, and Ive been inhalaing all kind of stuff, insulation particles, spackle dust, paint and sanding fumes, and I wonder all the time what this stuff is doing to me. I think the bottom line is if it will make you feel better, then stop. If you can get over it, and you dont hear anything about this stuff, keep it up. Sorry I didnt have more infor for you.
Jamie