Here is what worked for me:
First of all, I pushed the raised edges back in to the hole the best I could. Then I went through my old RC pit box and found my lexan body reamer. These can be had at any hobby shop for $15 to $20 (see pic below).
From there, I gently reamed the holes until all raised edges were gone. Came out great. Good luck.
2007 SGM e90 335i, Spt Pkg, Prem Pkg & Nav
Mods: JB4 G4-Map 5, BMS DCI, 19" Reps on Hk V12s, SupremePower Lowering Perches, BMS Angel Eyes, VSFR DP & 5" FMIC.