I am surprised Revvy hasn't chimed in yet with a million links proving it's impossible to remove the pickles from those buckets. At least according to Revvy, many people have tried to remove that smell over the years, all unsuccessfully.
I think you can maybe do it eventually, if you make a dozen batches in it, and you are willing to throw away the ones you can't drink. My reasoning is that I had a big-ass jar that I have used for yeast rinsing, which originally was a pickle jar. The jar itself is glass, and was completely odor-free after the first wash/rinse, but the lid on the other hand took a few time of processing yeast leftovers before the smell went away. It DID eventually go away, but it sure took a while.