I agree. However, duplicolor seems easier to wipe off than the other rattlecan engine enamels. For example, Rustoleum doesn't wipe off as easy with brake cleaner from my experience.
Who sprays or wipes their painted engine off with brake parts cleaner?
I could see fuel spill or brake fluid becoming a possible issue but if your taking the engine apart at all you womt be spraying it with brake parts cleaner, only thing that should get wiped with brake parts cleaner are bare machined surfaces such as gasket areas around the block or heads or intake.