Laminate plastic help!

[totts]

Its going to be a no parkin sign, about a4 size,

This is the sort of sign/plastic

Red with white writting.

[Bazzer]

Think this stuff is called "traffolyte", look at UK Engraving Services laser engraving machines, service and repairs
I've not used them so not a recommendation

[martin54]

Traffolyte is a trade name in much the same way as Perspex I believe but does sound like the sort of thing you are after, try searching for engraving laminate, you should find what you are looking for from a range of different suppliers.

[Swarfing]

If you can get the plain sheets then make your own? plumbers pvc glue or even some acetone will glue them together

[John S]

Everything you ever want for engraving.

Engraving Materials & Supplies Webshop