I'm looking at purchasing a Mercedes GL450 that looks like someone didn't really know how to use a rotary. My question is, is this something I can fix with a PC or would I have to use a rotary to fix this? I don't have a rotary.
Without any pictures it's hard to tell. If they are buffer trails they definately can be removed with a PC as buffer trails are not deep like scratches (ie wash induced swirls). Do you have something like Menz PF106 or Ultrafina or DACP? Try that with a finishing pad first if it doesn't do it you need to up the pad to a white polishing pad.
The car also looks like it was ran through an automatic car wash too many time. Should pc get rid of this? I was planning on using Menzerna SIP and P106ff. Is this strong enough
pc, orange pad, megs 105...then pc megs 83, white pad, then megs 80, finishing pad
its definitely doable...
or how about this...you as the person selling it if you can try a section out...if it works, you will buy, if not, they can have the car professionally detailed for you and then you will buy...
A while back, old-time member neoprufrok had holograms on his black A4 that he simply could not remove via PC. I dunno if he *ever* got 'em out :nixweiss But usually it's not *that* tough.
I'd certainly use 4" pads for this.
What product, and how many passes, will depend on how bad the marring (i.e., the carwash marring) is and how hard the clear is (is this ceramiclear?).
I myself would give this a lot of thought if I weren't a) equipped with an ETG, and b) confident that I could either fix it or have it fixed. Consider the (perhaps remote) possibility that one reason why they're selling it is the messed up paint; you don't want to be buying somebody else's serious problem.