I'm going to rattle can a D-60. First, I'll clean it. Then I plan to mask off the feed tower, load lever, and rear window, and just spray away.
Anything else I should be doing to protect the internals, etc?
I just masked as planned and sprayed the mag with whatever I had on hand - Aervoe and Alumahyde in a couple of colors. The spatter pattern was on purpose - yeah, for sure.
No problems loading, mag drops free, don't see any issues cropping up.