I'm extending the swingarm on my CB350 to increase shock travel and compensate for the CB450 stem which will decrease the wheelbase. Anyhow, the longer chain may slap and I'd like to protect my soon-to-be powdercoated swingarm. I want to mill out a little protector and mount to the existing chainguard mount but don't know what material to make it out of. Is there a specific or recommended type of plastic/polymer that I can purchase and use?