A perfect addition to your diorama is this Aires Aerobonus US Army Load set. Aires Aerobonus provides you with two resin pieces, perfect for a load in the back of a 1/48 scale 2-1/2 ton truck or a 1/48 cargo aircraft. The first piece consists of 12 sacks strapped to a wooden skid with the second piece consisting of four crates strapped to a wooden skid. Of note is the re-sealable packaging that Quickboost uses that makes the parts easy to review and then stuff back into the package securely.
Aires Aerobonus has molded the parts in light grey resin with no discernable bubbles. There are no mold seams to sand off and the resin plug is easily removed from the bottom with a razor saw or Dremel.
Although most paints will adhere to resin alone, I would recommend that you wash the parts to remove any remaining mold release and prime them first. I painted the sacks and the crates with Vallejo acrylic paints.