yep, just buy some a4 polycarbonate sheets off ebay to practice one. 1mm is the thiness on ebay but if you ask some of the sellers they will have thinner.
did you have a look through the basic step by step on using the masks on my site?
got some cheap translucent paints for sale
http://cgi.ebay.co.uk/Lexan-Polycarb...item3a6050a054
true candies are now ready also. ive been messing about with the mixture to get it right and am now happy to unleash it.