Try some mineral spirits (run of the mill solvent that should be available at local hardware store) before you get into all that crazy sanding business. I work with acryllic a lot at work and mineral spirits will take off most latex and acryllic based paints without damaging the material...
This is concerning the Gateway FPD2185W.
I'm not sure how to explain this, but screendoor effect seems to be the most accurate description. All the colors are fine except for the grays, which appear, for lack of a better word, shiny. It throws off contrast to the extreme in games with dark...