Tried a new technique for long exposure effect, I took 20 shots hand-held on continuous shooting mode and exported to PS as layers from LR. You then 'auto align layers' then convert to 'smart object' then 'stack mode' images using 'mean' mode.The results are pretty good and easier than using ND filters.
As you can see the water has smoother out, the more shots you take the smoother the effect. This is equivalent to about 3 sec exposure. The sculpture is called 'Still" by Rob Mulholland.