Charles Lessig wrote:
I've heard of "White Out" correction fluid being used for that.
Haven't tried it though.

Hmmm, I dunno about that.

"Titanium dioxide dust, when inhaled, has recently been classified
by the International Agency for Research on Cancer (IARC) as an
IARC Group 2B carcinogen possibly carcinogenic to humans."

http://en.wikipedia.org/wiki/Titanium_dioxide

--Winston