Originally Posted by MuddyPaws
Many coil springs are powdercoated from the factory.
OP: Look into getting some high temp plugs ... high temp tape to keep the powder off areas you don't want it.
Thanks for chiming in on the springs question ... good feedback. I have the high-temp tape, just haven't nabbed some silicone plugs yet. When I need to, a quick twist of aluminum foil and stuffing it in a threaded hole, has worked pretty well.