The old fingers do get a bit of a beating to begin with. There are a number of things to try to toughen up your finger tips quickly.
Try dipping them in methylated spirits (an alcohol based substance) everyday, and this will harden them up and make is easier to play longer. Make sure your fingers are healthy before putting anything on them.
If you've found something that works for you, have you say.
Thanks man, the tips about finger tips was quite helpful.