Shame about the topcoat trial. I have only done small sections of the Eureka, the rear louver being the largest. I initially used a brush, but the ridges really annoyed me. The last time I put a whole coat over the louver I first applied with a brush & then finished off with a high density mini roller. You do get an "artex" like texture. I found the artex texture to be more livable then the horrid brush strokes. I have not got as far as block sanding the entire louver yet so if you come to stones you can see what I have got so far & we can compare notes. I'm hoping that I'll get enough time between now & then to have a small section smoothed & polished for a comparison.