I told you on my thread, but Ill repost it here for your reference
"For the arm, I used something I learnt from zen when I was on another forum with him, THIN YOUR PAINT, better to do many coats instead of one thick streaky one. I put the paint on, and let it spread itself, on small things like that, then touch up the other areas and make sure it isnt to thick.
One thing I learnt on my own, use gently, soft strokes, dont force the brush, carress the piece with the brush, like your dusting off ancient artifacts on an archiological dig, be carefull and be gentle, and you wont have brush marks, the whole piece (figure) is hand painted, I dont AB my figures"
With the brush, have you ever made a cake, this is how I learned it. If you put the iceing on by forcing it, you will pull the cake appart, the same goes for a kit, if you force the brush you will leave brush marks and streaks and such. So be gentle, I rarley use the whole brush, I just use the tip now.
I also dont use alot of paint. I have some junk brushes for odd stuff that I dont care about (like 200 of them, ther crap but why waste them) the bristles are white/clear I use so little paint that when I wash them off they are clear and white again.