I'm building a batch of 4-way pallets, and I'm wondering if it is worth the extra price to go with all treated lumber, or if it's better to use untreated and just paint. What's you thoughts and experience? Also, on the frame stringers on the underside of the pallet: Should these be 1" x 6", 5/4 x 6", or 2" x 6"? Experienced information needed. Might have a few more questions later, if I think of some. Input welcome. Thanks!