I've posted here before about the guy sharing the shop space I use who is a welder and sculptor.He does amazing work, great guy. He built an enclosure around his space to try to contain any grinding dust or other byproducts of his work but it still seems to be creeping into the rest of the shop. This is a problem because we are building engines, (sometimes), and just generally working on cars and bikes with open cases, (engines/transmissions/etc.). The other occupant is a motorcycle track guy and maintains racing level cleanliness in his operations.
I already noticed a disturbing evidence of fine metal dust on some parts I had exposed outside of his enclosure, (I work near him), now my car that has been sitting inside for several months is covered in some strange substance that feels rough, like fine sandpaper. It comes off with clay bar but instantly ruins the bar with black who-knows-what.
Any welders here who might be able to illuminate me on this? Thanks.
The trunk lid had been smooth and clean a couple of months ago. Here is the proximity to his space, the enclosure on the right:
