Blue Tack is a useful product for us painters and modelers. First of all it can be used to temporarily set arms and legs in place to test placement for posing models. Though I myself don't use it for this much I have seen it done many times on some forums.
Another use that I do use often is it's ability to hold weight such as a miniature to the top of a GW paint pot so you have a nice grip to paint by.
1. You need the figure you are painting setup on the base as you want it and ready to prime.
2. Loctite Blue Tac or similar product ( the blue stuff you use to put posters up on the wall so they don't have holes in your dry wall)
3. A old dried out Games workshop paint pot
make a ball of blue tack
push the blue tack onto the top of the lid for the Games Workshop Paint Pot so that it covers the whole top and is smoothed around the edges (this keeps it from pulling off as easy when you take your model off.
Push your model PUSHING ONLY ON the base firmly into the blue tac till you have it in the position you would like.
Prime Your model and your ready to paint.
If you would like to add some weight to the handle try filling the GW paint pots with sculpty clay. Also if you want a bigger grip you can take two of the Games workshop pots and put the bottom to bottom and super glue them together that way you can grip it with your whole hand.
*WARNING* I have heard that this whole method doesn't work as well with metal models because of the weight. Even though the package says 5 lbs on it I think it means for use in a diffrent way. So use at your own risk on metal models.
Thanks for reading, and happy painting.