How to remove thumb smudge from matt?

[AFairley]

Silly me, I handled a matted print without wearing gloves or even washing my hands.  Now I see a faint thumb smudge on the matt. How can I remove it without making things worse?

[Rhossydd]

A putty rubber should sort that.

[pcgpcg]

I use a Staedtler Mars Plastic eraser for such occasions. Works wonders.

[AFairley]

Thanks

[mstevensphoto]

I like an artists kneaded eraser for this kind of thing or one of the white artists erasers

http://www.dickblick.com/products/generals-factis-extra-soft-eraser/

http://www.dickblick.com/products/prismacolor-kneaded-rubber-erasers/