I removed it all from my M3 and wife's MINI Cooper.....if you are talking about cosmoline
Get one of the hand held steamers, steam directly on to cosmoline and brush it away (I used one of my swissvax brushes)
Steam is what you are looking for..... I did not use any other products.
Retired: 2011 E92 M3 AW w/ Silver Novillo ZCP, ZTP, ZPP, 494, 6FL, 507, 302 & 415.....ED April 29th, 2010
Retired: 2007 E92 335i -Space Gray, Black Leatherette + Alum, Nav, ZCW, ZSP, PDC, CA & Sunshade.....ED Oct 19th, 2006