I am in the process of painting my Dynaflite Chipmunk with latex and so far I am not getting the results I had hoped for. First off, I do not have spray equipment and have been using both a good quality synthetic brush and a small foam roller. The paint is Rustoleum (Painter's Touch) Premium Latex and the color is sun yellow gloss. The wing is covered with natural Solartex and the fuselage is fully sheeted and fiberglassed with Minwax water based polycrylic. Brush marks are visible even though very light pressure is applied while painting. When rolled the paint appears somewhat moddled in that darker yellow spots are visible on the lighter areas. On the plus side, with 2 coats, the additional weight seem minimal. My next attempt will be with a Preval portable sprayer.

I have added 1 oz floetrol to 4 oz of latex and thinned with about 2 oz. of water. I didn't use the windshield washer fluid as I thought the blue color would tint the yellow to a light shade of green. Also, the following day the water separates from the latex in the left over paint. Is this normal?
Are the mix ratios O.K.? Should I try a different brand of paint? Any thoughts appreciated.

Thanks,

DaveB