Nail polish! The reverse-lube I was looking for 
I’ve applied it to the + hole in the key cap so the stem doesn’t become too thick for regular fitting caps. Seems to work fine so far. Will see how it fares through entire work days.
Thanks!
@skepp the film novelty set is great! I’m currently waiting for blank DSA 1u caps for the alphas so the cool ones stand out even more 