Best rattlecan paint for bikes?

Much depends on what you are spraying- plastikote 'chrome effect' is about the best I've found (code number 150-S) but it remains quite soft and marks easily so probably not much good for frames. Additional coats of clear lacquer seem to dull the finish and any contamination at all will show, such as fingerprints from handling between coats.
Aluminium spray paint is often brighter than so-called chrome or silver...