I have scrubbed vinyl screens with Spray nine, fantastic, and bleach using a scrub brush. The wine stain that had been covered with white out was gone in the end and the screen looked perfect. This was a matte white vinyl screen, no coatings or anything.
I have used hydrogen peroxide and denatured alcohol on my Dalite HP screen with no ill effect (no scrub brush just careful wiping wit a cloth) .
If you got the screen cheap, I would get the ink off and not worry to much as you will never be happy till it is gone.