This article may be confusing or unclear to readers. (August 2015) (Learn how and when to remove this template message) A generalization (or generalisation) is a concept in the inductive sense of that word, or an extension of a concept to less-specific English or mathematical criteria.
I always just used a good spray of Spray and Wipe on my whiteboard at school, and itâd come up clean everytime. The BETTER trick is knowing how to get permanent texta off your whiteboard when someone has picked up the wrong pen. Orange oil goo remover, then spray cleaner to get the orange oil off.
Removing Stubborn Stains and Permanent Marks. 1  1. Write over the stains with fresh dry erase marker. Pen and permanent marker will leave permanent marks on a whiteboard that can be very difficult to remove. 2  2. Allow the marker to dry. This should only take a few seconds. 3  3. Repeat if necessary.