Thanks John, Baron and CarlL for your comments,
No worries John,
Baron the raccoon warpaint Indian
CarlL yes they are metal bases, I have been using thin metal from a notice board used for attaching magnets, which is very thin, when I cut the shape of the base with scissors sometimes they warp, if this happens, I turn the metal base over on my work mat and use course sandpaper and rub it a couple of times and then its back to its original shape.
I have found a good thickness which does not warp when cutting but I do not have any Vernia calipers to measure the thickness at the moment.
Once painted I seal the surface with Tamiya clear base X-22 which gives a strong coating on the model and then move to applying 2 coats of Vallejo Polyurethane Matt Varnish and they are good for the harsh treatment on the gaming table.
