I missed that part and only read it was in a warehouse.
Then it will likely have some slime and the instructions above should work well. Be prepared when you haul it for whatever you find. Plastic scraper as described above might be good to have ready.
When I haul mine, the marina has a power washer available. I bring a pole with a brush and get most of the junk off when it's all still wet. Slime comes off best when it's still dripping wet. Marina doesn't seem to mind just dropping the slime in front of the marina on the ground. But that might not be welcome in other places.
I don't have paint on the bottom that I have to be careful of scraping off. However, the pole allows me to reach under the boat without getting up close and personal.

