3D Printed Piper Cub Engine, this is supplied as resin parts that you need to join together with adhesive.
Epoxy or cyano.
The example shown was very quickly assembled and airbrushed with Humbrol. Sand it first for a better finish.
The white parts are the resin colours as supplied (this may change from what's shown)
finally the grey ones are just sprayed with rattle can simple primer (mostly because it was difficult to see the white resin parts in the photos!). Different sizes can be provided.