I'm thinking of doing some pyramid inlays on a warmoth neck.

With stickers, like car stickers and such.

I just wanna know, what clear coats can a maple fretboard take, and will it affect playability in any way?
Ibanez s540 with gold Schaller bridge and OMGGOLD hardware

Ibanez RGR320 with Lo-Edge Pro bridge and scalloped fretboard

Lee Jackson XLSC - 500

Roland Microcube

Dunlop Jazz III black
If the frets are big enough you can even just put stickers in place the strings won't even touch them, unless you fret your strings too hard & vibrato while pushing them, but again that's not the best technique for vibrato. So inlay-wise you'd be alright with jumbo frets on the neck
I love music, if music would be a girl then I'd date her, until then let's get back on Earth