Somebody was washing off what I thought was glass, so i advised them to dry it with kitchen paper towel to avoid the local hard water chalk stains.
Then I discovered it was 'plastic' from a picture frame and the paper towel has left a smear mark on the plastic.
We have tried the glass polish 'turtle wax clear view', but it's still not leaving a clear finish, rather a smear finish that looks like grease; but is not. Grateful for any futher suggestions, on a very fine way to polish up what looks like quite a soft plastic.