ShinyShoe, gpsguru, thanks for your advice.
As it turns out because I was able to take stuff off with the mark 1 human thumbnail, I thought I'd give it a go with an expired National Trust card, similar to a credit card.
Using this gently without going mad I'm getting the stuff off.
Seems ok, fingers crossed that I'm not doing any damage, don't think so.
Thanks guys.
Regards from Terry.
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