It can be wet sanded but you have to wait to get a good finish . I really liked working with the fast dry poly , it gave a great finish and all it needed was a quick buffing on the wheel with white diamond to get a glass like shine , the wipe on was a bit of a pain because it is so thin it just keeps soaking in and took forever to build a good finish . Again the only problem is the wait time , I found myself finishing my blanks and putting them away for about a month before I could buff them . You can speed up the process of finishing them by putting them in a post cure oven for about an hour then putting the next coat on but curing the finish still took weeks . When it is fully cured it is as hard as any CA finish I have ever done but I'm just too impatient to wait for it to cure .
By the way , neither of these finishes work right on oily woods like cocobolo , they never dry . Even cleaning with Acetone didn't help very much .