Almost finished with SW17 except I have a few problem spots in my varnish:>( I wet sanded between each coat first using 400 grit then to 1500grit. I used foam brush and put on as thin as possible without streaks, still a few dust specks. I tried the 1500 to smooth out and then polishing compound (very smoth them) but could not high gloss back. If I use just polishing compound boat gets better and still keeps the shine but still the dust specks sticking up. I'm not looking for perfect, yes I will be putting it in the water and she will get banged around a bit but I would like her but smooth and glossy.