I have used TK COLOURSPRAY - SPRAY PAINTS FOR ENGINES 400ml - MERCURY BLACK on the engine and it works well. After getting the mufflers blasted I used this paint on them too. I did not use primer as instructions on tin were vague and I was not aware of a heat resistant primer. I did however use VHT paint similar to BBQ paint but aerosol, instead of a primer. The top coat of TK has not survived, and is peeling off at the base of the mufflers. The BBQ paint under it is ok. Does anyone know of a suitable paint? I would rather not use the BBQ paint as it is very matt.