Comment
All you can really do is use the best highest VHT (Very high temperature) paint you can find but it will still gradually burn off on an M20. I just keep touching it up until the next time I need to take it off and an opportunity to do it again. I have heard good reports of the black paint that's used for BBQ's and pot belly stoves 
Ron
email (option): ronpier@talk21.com
Michael
I sprayed my cilinder and head 9 years ago with ordinary heat resist paint.
Still holds reasonably well.
The trick is to keep the bike dry and away from rain, damp and so on.
Still holds reasonably well.
The trick is to keep the bike dry and away from rain, damp and so on.
In the UK ?
fat chance.
Pot belly black slapped on with zeal and a 10" broom as it would have been done during the war
email (option): bsansw1@tpg.com.au