[thecatspajamas]

Just colored over the entire area I wanted to "erase" with the dry erase marker. I suppose you could also trace what you wanted to erase with it, but if it's all wiping off cleanly anyway, no need to be that careful.

In the sequence of 3 scans above, the first shows the unaltered "19" below the signature, second scan is with dry erase marker completely covering the "19" (but not the signature area), and the third is after wiping the dry erase marker blob (with sharpie "19" underneath) off completely. The darker "blob" in the middle of the dry erase blob in the central image is where the dry erase ink "pooled" because I was making such a thick layer and had to allow a few extra seconds for that portion to dry. None of the "19" was visible through the dry erase layer after I applied it.