Either make them cheaper or better. The acrylic vats that most of these machines use were designed for ease of manufacture (acrylic is really easy to cut with a laser) rather than durability. A glass (preferably borosilicate) vat would work better for longer, since it would be easy to clean out with alcohol (which degrades acrylic) while scratches and fingerprints wouldn't be as big an issue.

Just offering a PDMS recoating service might be a viable business idea, since it's a hassle and requires some equipment and know-how most people don't have.

Andrew Werby
www.computersculpture.com