John Rumm wrote:
OG wrote:

Stick it in the freezer.

then gently bend it back so the wax comes away from the surface.

Or is that for a tablecloth?


No, blotting paper and a warm iron for tablecloths so your advice must
be for windscreens.


Windolene Original, a combination of white spirit and chalk. The white
spirit will dissolve the wax if it *is* wax. If it's a synthetic
wax-like polymer, very hot water/detergent will probably be your best bet.