Below you will see a blemish on on a part that I did recently. This is Eastwood powder, “Red Wagon”. I did a number of parts this day, and only this part has tree of these marks. Although the part is assembled, it needs to come apart and be sand blasted again – all of it ?? and PC again.
Could this be moisture ? Lots of rain lately, and my water filter on my compressor is very small. Or is it something else ?