Clean up a simple mesh in Houdini and get it print ready.

The model is in a houdini scene file. The model is already done. The model only needs to be cleaned up and optimized for 3d printing according to the shapeway guidelines for printing in sandstone. The scale of the model needs to be in cm. I want the model printed in all black. You need to alert me if anything aspect of the model doesnt fit the 3d printing guidelines. Once cleaned up. You need to convert the model to a file format thats optimal for shapeway printing. The model is very simple,Please See attachment. Please have 'Houdini mesh clean up' as the subject of ur message, so that I know you have read all the requirements. Thx.