Need quick chicken help

I have some friends coming over. The chicken is close to done but I couldn't get the smoker very hot (it's too cold outside) to crisp up the skin. It ended up being more low and slow than I expected. Anyway, I want to finish it on the grill so the skin isn't soggy. I haven't finished it on the grill before. How hot should I grill and for how long? I didn't know if it was very hot and fast or something longer.

Thanks in advance. Also, thanks to everybody for the Fatty help. They smell great and the guests will miss out if they are late!