Can be tricky; I would suggest either a citrus degreaser like P21S Total Auto Wash, sprayed on, left for five minutes, then wash the car normally, dry and reprotect... or, Autosmart Tardis, sprayed on, left a minute, then rinsed off and the car then dried and reprotected. Both methods rely on the chemical being allowed to soften the polish, which can then be washed/rinsed away before the paint is reprotected. The downside is that both methods remove any paint protection present, hence why you must reapply your wax or sealant afterwards. :icon_thumright: