i think that it can be done, though it would be a long job
you would need some sort of plastic primer or sand down the plastic so the paint can take, then apply several coats of paint, then put a clear coat to seal it.
Though i do beleive that you will be voiding the warranty.
Good to see that gus is out and about again, did you enjoy our game the other day backdoor?
hips hips hips!!