When I paint with watercolors I like to make sure I have a nice paper made with cotton so the colors don't run.
Is the paper important for the watercolors not to run?
Yes, it is very important. Have you ever tried to paint with watercolors and had the paint just sit on top of the paper and run? You don't want that to happen.
I've never painted with watercolors. Is it difficult to learn painting?
Anyone can do it, but some of the greats, such as Alfredo Guati Rojo, really made it an art form. 
Did he have any famous paintings I might have heard of?
Probably not, but you can see many of his paintings at the museum dedicated to his work in the Coyoacan borough in Mexico City.
Did he only paint in watercolors?
made it the first capital of New Spain between 1521 and 1523. The village, later municipality, of Coyoacan remained completely independent of Mexico City through the colonial period into the 19th century. In 1857, the area was incorporated into the Federal District when this district was expanded. In 1928, the borough was created when the Federal District was divided into sixteen boroughs. The urban sprawl of Mexico City reached the borough in the mid 20th century, turning farms, former lakes and forests into developed areas, but many of the
a painting, a landscape, to me it’s the mood conveyed that counts.”
“A friend of mine New York at the Salmagundi Club asked me why I didn’t paint watercolors. I said I don’t know how, and he said all you have to do is keep your board a little slanted so when you wash the color onto the paper it runs downhill. That I was my only lesson in watercolor.”
“It’s hard to say whether I have a favorite place to paint.