The resin I cast with is very durable it has a very small amount of flex in it which is a good thing for vibration. When cold cast with a metal, say brass, it is almost just like brass. Almost being the key word. I would never use a cold cast part for something structural like risers or a kickstand. Cold cast is also not as heat resistant so you could not cast something for your exhaust, other then those rules all else is fair game.
I have a buddy who does spectra chroming (also powder coating, polishing and fabrication). This is the same type of process that is used on the dash that ships with the Speedmaster. He can chrome anything I cast. A translucent coat at the end can also be added to make the chrome a color, black chrome, gold chrome, custom color chrome, etc. Like the dash on the triumph this finish is very tough.