[Note: The goal of this project is to get the right combinations of parameters so that printing with TPU filament can be as easy as printing with PLA filament. Go to the end of this thread to get the results.] Yes, my C2 printer is so old that it is printing mushrooms That aside, can a model printed in TPU filament be lightly sanded? Update: NO! The flexibility of the TPU filament causes the surface to get worse with sanding.