Just a remark about using high f-numbers...: Most lenses produce the best results when stopped down to about f5.6 or f8, but the image quality degrades from f11, f16 and further (sharpness drops due to light dispersion caused by the edges of the narrowing diafragm). So f32 doesn't sound like such a good idea... Have you tried using both ND and Polarising filters at the same time..? Still the best idea is to shoot in low light... early in the morning or late in the afternoon, preferably with a heavily overcast sky...

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ