You need to heat up the glue that holds them together. eg, put them in the oven/ heat gun. Pull them apart, get some wet and dry sand paper and go for it. Finish it off with a polish and Sikafelx back together.
One of my mates want to enter his S15. Its got GTRS turbo, lowered, origin kit, Stereo, 20ich Tempe tyres wheels (5spoke) , exhaust. I told him not to bother cause of the wheels. Would the wheels mean a no no? (Pm if need be)