Boring terracotta pots

I'm researching the best way to refinish all my boring terracotta pots.

I think they're going to need some prep first.
http://www.the-artistic-garden.com/painting-terra-cotta-prep.html

Some ideas
http://www.ehow.com/how_2224053_bright-shiny-finish-terracotta-pots.html

http://www.casacullen.com/2010/03/diy-how-to-paint-terra-cotta-pots-and-planters.html

http://www.krylon.com/projects/outdoor/terra-cotta/

http://www.younghouselove.com/2009/03/planter-banter/

I'm not sure about painting the inside though, since I do want to use these for food.

I like this site, at the bottom it has "Clay Flower Pot Possibilities" I want to try all three!
http://www.container-gardening-made-easy.com/clay-flower-pots.html
and Martha with all those ideas expanded...
http://www.marthastewart.com/article/making-history-aging-pots