What really got me motivated to start these tiles was a new product from GW, RoughCoat, which can be used to add a roughened coating to expanded polystyrene, which should a) protect the tiles b) work well on the AT buildings I now have for the cityfight terrain.
Well getting hold of a can of RoughCoat is proving a bit of a nightmare, more popular than GW Marketing thought so virtually every GW store is out of stock.
Looked at the boards and added some more black duct tape as the thinner edges were lifting.
On the desert terrain I glued some cork and rocks down.