S350 wheels.... my favorite subject...
Prestine refirbished mine twice, the first time was fine for about 3months and then almost overnight all the paint came off. They redid them for me about 6months ago, and so far OK
I believe that the first time they didn't use the correct etch primer, the second time they took a little more care... (after a meeting with the boss).
So, I think I would recommend them. BUT I still feel that having these wheels refirbished is always going to be problematic. For sure, I doubt they are using an inert atmosphere, you will have to use a aerospace company for that, and it would probabily end up cheaper to buy new wheels...
I was left with little choice after I originally went to another company who said they could do it, and the paint fell off in weeks. But if mine still had the original OZ factory paint on, I would be tempted to leave the original paint on, and just rub down and locally repaint any areas of corrosion..
So, in summary. Prestigne have done mine, and they still look great after 6 months. BUT it did take a failed first attempt to get it right. Hopefully they have learnt their lesson...
Out of interest, I'm about to use them again on some 20" aluminium wheels for my dad's XKR. their work is very good.
Will