Sure, just scruff up the old paint,apply a primer coat and then the top coat. If you use a brush there will be brush marks. Maybe a paint roller would work. So you may want to use an aerosol paint can. I would test out your technique on a piece of metal first. Or if you could get the unit to a body shop they could paint the unit for you. A long shot is to look in the yellow pages under painting and call some of them to see if they can steer you in the right dircetion to find someone that does that type of work if you do not want to do it yourself.
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