My kits are cast in a tough, dense, dental plaster. This is a very different material from ordinary plaster of Paris and thus requires a slightly different approach.
When you open your kit for the first time it's a good idea to remove the castings from the wrapping to allow the plaster to 'breathe'.
In rare instances warping may be apparent in some of the larger castings. If this is the case, submerge the item in a bowl of water for about 5 minutes. Then place the casting on a solid, flat surface (e.g. a kitchen worktop) with a suitable heavy weight on top - such as a house brick or a large book. Leave for a few hours to allow the product to return to a flat state.
Simple PVA glue can be used top bond the castings. However, be sure to wipe of any excess with a wet cloth and allow 24 hours for the glue to harden. If time is an issue you can also use Cyanoacrylate (Super Glue).
The dental plaster is an extremely durable material. It can be drilled, filed and carved with a variety of tools.
There is no need to prime the kit before painting. You can use both enamel and acrylic paint on the castings straight out of the box.
Simon Farrugia