hello mate
i sprayed the silver ones on the gs black like the gsa,
its pretty easy to do,
just took them off and gave them a couple of coats of halfords grey primer, then a couple of coats of halfords satin black paint, then a couple of coats of satin lacquer and came up rather well, cant post pics as im at work but its a pretty easy and straight forward job.
what colour you thinking of doing them?
jon