Just enquired about getting some engine components and cam covers done in black crackle. And have been told its been eu banned. Anyone else found this, or got a secret source.
If tried some the aerosol stuff and the results were not great - but this may well of been down to technique. The instructions on mine insisted that you had to spray in a room above 25'c. I may of got the room too hot and it dried too quickly.
I used the Frost stuff on my disaerator with good results. I applied it to bare alu that had been prepped with wire wool and properly degreased. I do think the heat we've been having helped a lot. Also, I left it a good 3 days to cure properly.
I used the crackle finish aerosol on a Honda B-series cam cover (notorious for all the paint falling off). The finish was excellent, just as good as the original but it started flaking off after 18 months. I think etch primer is essential for a long lasting finish on aluminium.