I've heard of "issues" with certain solvents. Would they actually "melt" if I get a drop or ten of Hoppes on them?jack_daniels454 said:I have a set of Truglo TFO and I like them. They are metal bases. They glow in the dark as well as in the daylight. They are very sturdy, just make sure you put a little loc-tite on the front sight screw. That way they won't come lose or rattle. Good luck and hope this helps.