where to buy the black plastic sheet with a grain effect on one side ? any help appreciated...

http://www.woolies-trim.co.uk/c-146-millboard.aspx

Not plastic but will this do?

i saw this a Woolies but i need /want the plastic stuff as it has to be water proof ,thanks anyway...

Signmakers use a plastic board called Foamex which comes in 3mm, 6mm & 10mm thicknesses - I have used it in the past to good effect.

Googled Raz's Foamex and found These Peolple.

Steve

Amari Plastics.
Albion Plastics.

Ask for Black Embossed Polypropylene. (it has a leather grain look, as i'm using some for a solid boot cover)

I work for the latter one in Bristol.
Amari are all over the country