I'm uncut and do it always dry. I have tried to take skin down and do bare with lube, but don't like.
As to precum, I have almost nothing nowadays, maybe due to age. When on vacation I was often to sauna and wanked many guys. I was amazed about an a bit older guy i met in steam room. Nice sized cock when I got him hard. Normally I don't like cut, but started to play with him. I've never seen a guy precuming that hugely. I saw it flowing and milked out more and his whole cock got so nice wet and slippery and even some dropped to the floor. His cock became so nice and slippery and fun wank, and I wanked him until he cum, shooting long ropes and some even landed on me. He said thanks and we parted!