Thanks for the tips guys!
The real problems is that currently ALL I have is a bucket of stick ons.
The tyre place down the road have all their clip ons spoken for for the next year or so..
All they could spare me is stick ons.
So I am pretty much stuck on stick on weights (pun not intended)
Looks like Kerosene does loosen the stickies, I may have to spend some time peeling them off later.
But doing this will ensure that the yucky

fumes wont kill all the plants in my yard.
As for it being soft, well GREAT!!
My plan is to make some plain side molds and cast some very soft pellets for paper patch job.
My aim is to have some expanding type of bullet for my subsonic 300 whisper.
And Dave, Welcome back mate.. haven't been hearing from you for a while!!
How is the shoulder going? can you type with two hands now?