so i couldnt get hold of a beading tool and i had some jb weld so thought i would give it a go and see what happens!!
firstly key the end of the pipe with sand paper

then using what you have to hand (a bottle top) you need to cut out a guide that will run around the rim of the pipe with a little nic tacken out of it... this is what will be forming the bead

then mix up equal parts of the jb weld and leave to harden for a short while

apply the weld to the rim of the pipe approximatly where the bead will be (i used a chop stick)

then using the guide run it slowly around the rim to form the bead

then leave to dry....but check it as it may need the occasional touch up with the 'guide' tool

once dry it can be fine sanded to make extra smooth