Glyptal engine paint??

Just used it on my new 416, no apparent issues. Had it on my last 340 too, no issues there either.

Some have said they won't use it for fear of flaking off in big sheets or some such nonsense. Just make sure the surface to be painted is really clean - like clean it thoroughly, spray down with solvent, dry with air, clean it again, then again, then go back and clean it again.

Use common sense too - don't paint machined surfaces etc.

It can be used for other stuff too, like inside a rear end housing.