Hi I've just bought a 2001 compass rallye. Front and rear panels are oxidised quite badly. Just wondered if anyone could tell me if its abs or grp. I used to do abit of Valeting so have lots of different polishes and cleaning chemicals. I can machine polish. Got 3m perfect it range of polishes, a lot of autosmart polishes. Just wondered if anyone has had good results with any of these as I've never had to polish a caravan before. Thanks in advance