Here is what I did when painting my 16' boat. I went to walmart and bought about 15 cans of their cheap primer, and then some cans of Krylon camo paint in the green color. .98 a can! I used paint stripper on my boat to get all of the old paint off of it first, then washed it off good with water and let it dry. I then primered the whole boat with the cheap paint. We have alot of grey looking timber here, so it worked well here. I used that as a base, then I held up branches against it and sprayed the green over the top of the branches to get a branch pattern. I did that all over the boat, and have had ALOT of compliments on it at the boat ramps. Just a cheap way to do it, and it has lasted 2 seasons now, and I can swear to you, I'm not easy on my boat during season!
Guns kill people like the spoon made Rosie O'donnell FAT!