From the makers of Perfect Plastic Putty..

[Cap'n Wannabe]

http://www.dheaustralia.com/liquid-gravity
Might be worth a go on my next Bongo..

[hrtpaul]

It looks like it would be pretty good. If you've got a friend that's a licenced gun owner, get them to buy you some shotgun shells with No7 shot and cut them open to remove the shot. I've got the shot from 2 boxes worth and it'll last me quite a while. I wanted to buy the shot directly from the gun shop but I'd have to buy 10kg minimum and I'd never, even with all the F-4's I have, use that much. Just a suggestion