get a paint called door shuts or somethin.. it dries out rough ish but much harder then other poaint and will resist chips more.. any motor factors should have it.. only lookin at it a our ago but cnt remember name..
if u want u could but the hammerite over it aswell.
go to a jcb yard thing and get them to paint it
cnt even think of it.. wen u rub it it feels a bit rough.. im using it on my spats where its behind the wheel and blowing in a bit of grey over it.. ppl use it for under cars arches ect..
i think you mean "tetra schultz" LOL
We sell it at work, its good stuff the only catch it you need a undercoating spray gun.
But all you would really need is hammerite.