As there’s been a fair amount of discussion over the surface finish of 3D printed models, can I offer up my experiences?
Below is a shot of a project I’m currently on with (Recreation21 O gauge GT3). The print as delivered had the same finish as Billy’s 503 (I’ve quoted it for reference, hope you don’t mind Billy).
For starters ignore everything below soulbar level, we’re looking purely at the body. The tender has had three coats of halfords primer, rubbed down with 400 grit paper between coats, and two coats of Plastikote gloss rubbed down with 1000 grit paper between coats. This has produced a finish that is fair. It’s worth noting that I didn’t flat back the corridor connection on the back of the tender. This gives an idea of the difference the effort has made on the rest of the model.
On the loco a third coat of gloss has produced a good flat finish (You’ll have to take my word for it at the moment, the weather hasn’t been kind enough for me to get a photo in natural daylight yet!).
In short as supplied by shapeways, the prints require a fair amount of time and effort. But good results can be had! I’ll admit though that trying to get a good finish on window frames is at best a challenge, so coaching stock will test the builders patience to breaking point!
Jonny Ward