I haven't struck this before so I thought I would throw it out for some help. I was doing a basic exterior clean on a customers 1996 Toyota Prado (Mid sized 4WD for those of you outside NZ or Aussie) and there are finger and palm prints over about 30% of the paintwork which customer advises were caused by having sunblock on their hands. Washing the car didn't have any effect on them at all (although they did "disappear" while the car was wet).I tested a little UC on a foam pad by hand which improved them by about 50% but with the car that age the UC also markedly improved the surrounding paint. To go over every spot affected this way would leave the paint in a rather patchwork state. Before recommending to the customer I DA polish the whole thing has anyone struck this before who could comment on the likely results so far as removing the fingerprints this way is concerned? I don't want to overstate the likely results to the customer. I did also try a little tar removing solvent to see if that angle worked - they disappeared at first but returned as soon as the solvent was wiped away/dried.
Thanks for all your help.