I have seen someone do a complete repaint of a black Spotmatic before now. He wanted a black one but all the examples he found were really rough and overpriced for their condition, so he picked up a scuffed but undented chrome one as a donor.
The other important thing (aside from getting the old finish off - he had the panels blasted with very fine grit after removing them from the camera) is to use an etch primer on brass. If you don't then the paint will probably fall off later on. Use normal automotive spray paints for the black and the lacquer - you can usually buy satin or matte finish lacquer. If it can handle being outside in all weathers for decades then it'll cope with being on a camera.
I find normal model acrylic paints and a fine brush are the best bet for redoing the markings afterwards. Try giving the panels a thin coat of lacquer first to seal the black paint, that way you can wash the acrylic off if it goes completely pear shaped (and use a fingernail to scrape any small excess off). Add another coat of lacquer after to seal it all in and then reassemble the camera.
I don't worry too much about brassing but I will touch up the markings. Just because I don't like it when they're half worn off. Same goes for the Pentax M series lens caps with the raised lettering - the silver paint wears off and I generally redo it in the same way. Needs a steady hand but as I'm using acrylics I can just give it a scrub in warm soapy water if it goes wrong.
Last edited by PentaxBronica; 01-18-2013 at 03:20 AM. Click to view previous post history.