Plastic dip is pretty resistent if you put enough coats (and if you do get scratches you could always put another coat). For the washing part though it is a bit "rubbery" and is harder to wash then real plastic. For that reason I didnt paint around the front light.
I did the fork guards on my MT-01 and after about 12000km of bugs and rocks they still look like new. And often I can just shoot the hose directly on them and all bugs are removed, but these are pretty straight surfaces unlike the plastic around the headlight. The more complexe the shape, the harder it is to get an equal smooth finish. One thing though that helps is making sure you shoot thick enough coats, if you go by thin coats, the surface will be very rough, if you apply it thick, its smooths out pretty good. What I like is the texture really looks like OEM plastic. And don't worry it won't peel off in the wind, you really need to want to peel it to remove it.
*The engine cover between the 2 pistons and the air intake were painted with satin finish paint (one was full aluminum, the other was plastic wrapped in a thin aluminum sheet like they did on bikes in the 80s), with the satin black paint it also looks OEM but it's requires WAY more time and prep to get it right (Must have spent 20 hours in all to clean, sand, prime, shoot, then you notice its not perfect, resand a part, reshoot, until its perfect, then your mecanic removes the tank and drops gas on one side and you need to restart from 0 - yeah next time I'll remove the parts before having maintenance done under the tank). I dont think the paint would have resisted long on the fork guards without a thick clear coat and then they would have been shiny, and I wanted all to be satin or matte black. As for the sides they are still like new, but they're never in contact with anything.
On the versys the plastics near the pegs wouldnt last long if painted with standard paint you boots and pants might touch them once in a while. I think the only options are plastic dip, or buying some black ones from Kawasaki.