Thank you Modlbldr!
Honestly, me too I though it was hard to hand brush the paint with all those details, but after the first part I painted on the body, I start to convince myself on a possibility. The big concern I had was to have kind of "bumps" on the color. For faint I use acrylic, I don't remember the brand right now. The paint is smooth because I used a lot of water for thinner it. For example the big part I painted, like the yellow, blue etc. I had to give around 8 coats of color. For the black color is little less, because it cover better the primer. Lighter colors required more coats. It is time consuming, but I think the a the end looks good. I don't have a % of water I use for thinner the color, because I go by eyes.
Thanks!