Why Do I Say Keep Your Paints Wet?

My tag line is " keep the whites of your paper white and your paints wet". Why do I say this? Watch the video to find out.
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What I have learned so far:
Patience. With a capitol "P". It took all day to load this video. Our internet services is very poor and something we have to learn deal with daily. It is a love hate relationship . If you try try and try again things might work .