4 wooden pallets bed

Yesterday I started new project for my client. It is simple 4 pallets bed. After I collected wooden pallets from the nearby shopping mall and get them on the site I cleaned them with the angle grinder and sand paper. Just to see difference between dirty and clean pallet I will post some pics.
This is a dirty pallet:

And this is a partly cleaned pallet:

 Today I will add planks to fill this spaces between existing planks and I will paint wooden pallets.