Update,
I decided on the metal barrel, mainly because the resin one did not want to remain straight....
So the choice of putty to use. I have used
Tamiya and MagicSculp before and with good results, but thoght I would use the Geomfix (original A&B) and see how that works out....
First the barrel was rough sanded to give the putty something to grip. It was then marked out with masking tape....
The putty mixed up well and with very little stickiness that you get with some of the other brands....
Then I used one of the sprue bags, some talcum powder sprinkled inside and a 6inch rolling pin to roll out the putty which I had split into three lumps....
And there we are, three nice thin sheets about half a mm thick, and not all will be used...
So - taking one sheet of putty I measured out the width and approximate length, (look away now) I then licked around the bare part of the barrel to wet it, why lick it? because I had forgotten to get some water and it seemed the right thing to do at the time, and in fact it worked as I did not have gallons of water all over the work bench and myself to clean up after.... So the middle went on first and then the two outer sections.....
Then using the shaping tools I added the shapes of material to the surface and finished off the texture by dabbing the end of a tooth brush bristles around the still soft putty. Now all that needs to be added is the securing straps and fasteners....
All of the wheels are now assembled and ready for a final clean up. I have decided not to use the interim idler wheel but use the later ones that look like the Chieftain ones but a larger in size (when I find them).....
And that is it for now - off now to do some turret texturing...
Cheers
Mike