While we on this: I noticed lots of interior design projects, where old pallets are used( Euro Pallet being the most popular). They are all treated with chemicals to withstand harsh environments and definetly shouldn't be used indoors.
This isn't true. Most pallets are heat treated now and can be distinguished by "HT" on the side.
You should still be careful about selecting and working with pallet wood. They can be subject to hazardous spills and can have random debris embedded in them that will damage blades.
I checked a few of the pallets where I work; they're heat treated, no chemical treatment. But! While I'd feel safe using the pallets used to ship corrugate bundles, the pallets used to ship the sketchy drums of mystery chemicals look identical and end up in the same trailers headed off to some pallet recycler.
Also, dust from certain species of wood can be quite bad for you. If I didn't know the origin and history of a piece of wood, I'd likely avoid working with it.
