Has anyone tried spraypainting plastic encoder/pot knobs before?

[gatesphere]

I'm building a Seq in an odd color scheme (no spoilers, I'll post pictures of the build as things progress) and I can't find decent knobs at a decent price point that match the colors I'm aiming for.  So I've ordered a bulk bag of cheapo Chinese pot knobs that I was thinking of giving a spray with some plastic-formulated spray paint, and then a clear coat.

Has anyone done this before?  Just curious if there are any tips/tricks...