Pulled my primary to send to coop. When I got the cover off the Primary was filthy and covered in dark colored dust or dirt. I haven’t been into the clutch in a while so is this just dust from normal riding? Once I cleaned everything up it looked fine but just wondering what this is from. Also the bolts for the cover were extremely tight and lightly rusted. Anyone ever used some anti-seize to keep them from getting to tight or is there another method to prevent this problem?