well...looking up videos about wood scrapers, I bumped across this one, where he speaks of that loos wire bristle issue:
https://www.youtube.com/watch?v=oflBSJe6w1Ynow that said, I've been grilling all my life and can't say I've ever had that as an issue.
I'm curious how clean the wood scraper does...it will be smooth, even if grooved, and not really 'scrape'. then there is the issue of what wood to use. Amazon shows cedar and oak samples.
I can see these working well with cast iron grills...but no to much porcelain/stainless steel.