Ah ha, the good old Evening Post, I used to deliver that as a boy!
If you've seen my project thread you'll know that I sprayed my rocker cover Oak Green to match the car. Rocker covers get very hot, but then again do you know the temperature the paint gets in an bodyshop oven? Normal 'rattle' can paint will do the job sufficiently and unless you set it on fire (like me :embarassed: ) the paint won't crack.