Good morning Rockbag, I hav two CLYDE PUFFERS both 3D printed by a clubmate. I was given a small print drawing which reads in part "some of these vessels had black/red hulls but most later ones were mid-grey overall". Title on the drawing is LOCHINVAR-CLYDE PUFFER. Mine are 16" & 24" l.o.a. The smaller one is dark red up to deck & black above, the longer one is being painted with pearl grey acrylic, a self-priming porch & floor paint, as apparently 3D printed hulls are porous enough that they absorb a lot of water.