Sounds like you're using an automotive sprayer. You need to set your compressor's regulator to 60 PSI max or the can may explode. If the compressor doesn't have an adjustable regulator, you'll need to install one.
The two approaches that might actually work (both rather expensive) are to replace the taps and fittings with factory black ones, or to send the ones you have now out for replating with a black nickel process.
Paint on chrome is a failure that usually does not wait to happen.
I guess there is the option of "Plasti-Dip" - a rubbery spray coating that is commonly used by auto enthusiasts to recolor and/or protect chrome parts - in a somewhat reversible manner (it can be peeled off.) Being rubbery it does not chip, and reports are that it holds up pretty well until deliberately peeled off. Here's a link (no association and I'm not really a fan of the stuff, despite being aware of it.)
http://www.eastwood.com/blog/tech-articles/plasti-dip-faqs-frequently-asked-questions-about-dipping-cars/
Best Answer
It isn't the maximum air pressure that one should consider when using a compressor for painting. You will want to match the specifications of the device being used to paint with the compressor selected.
If you have a paint gun that requires 10 cubic feet per minute (CFM) at 80 psi, and your compressor provides 2 CFM at 150 psi, look for the ratings at lower pressures. A properly documented product will list more than one figure, not only the high end of things.
Typically, the high pressure figure will have a low CFM to match, but it does not mean that you'll get the higher CFM at lower pressures either.
As part of this research, I located a spray gun that lists to require 6.4 scfm @ 50 psi. If you locate a compressor that provides 7 scfm @ 50 psi, you'd be good to go, but if it lists that 7 scfm figure at 40 psi, you would be risking a mis-match.
Airless sprayers use pumps to force paint through the nozzle, turning it into an aerosol for application. Similar systems use air pressure to apply force to a liquid, driving it through a nozzle in a similar manner but not using the air to convert the liquid to an aerosol, in the manner of ordinary spray painting.