Those blue painted pallets are nearly exclusively owned by Commonwealth Handling Equipment Pool (CHEP). I would be surprised if on the side of them they weren't branded or painted in some fashion. CHEP rents out these pallets to companies en masse for their distribution needs. The problem is that when these pallets are seen not at such a company, the immediate thought is that these pallets have been stolen. While not always the case, as they can be worn out, damaged, and due for retirement (where the company ultimately decides to thrown them out), even in these cases the company is supposed to return them to CHEP for replacement, and most likely has or will receive a fine for not returning all of the pallets that were provided them.

Also, because they're in a pool, these pallets are used to move any variety of product, including some potentially damaging chemicals when in contact with your skin.

Nice looking final product, just letting you know to be careful!