Can you spray paint (or something) a wooden thumbhole stock? (Wood is pourous so wouldn't it look weird?)

I would like to find a solid black thumbhole stock but the only plastic one (carbon fiber/fiberglass) I've found is a McMillian for over $300!!!

The wooden ones I found are all grey or other dark mixed colors and not a solid black...

Thoughts comments?

I did find a "shooters ridge" black plastic thumbhole but the reviews don't seem to be adequate....