The Artisan Hall Series is a program where artists would visit the company and hand paint an entire run of models. The artist would sign and number each model. The early releases came with a paper Certificate of Authenticity signed and dated by Peter Stone. Later, each model came with a Collector Card with the model's description and a pre-printed signature by Peter Stone. Each run was limited to 200 pieces.
The 21st release was a Brindle Palouse called Sandstone. Painted by Myla Pearce. Available in matte and glossy finish, and a custom and non-custom version. The custom version, limited to only 35 pieces, has a tucked head, openly flared mane, lifted foreleg and an arched pastern on the hind leg. There are many variations with striping and shading on this run.