Found this little guy and decided to paint the model in Bambu Studio. Photos are a bit old, I repainted the model since, so it's a bit nicer than this older print. I recommend using adaptive layers for the round top areas. Enjoy!
I printed on cool-plate, you can try using a smooth PEI (from Bambu) or PEI plate. Also you can try adding a brim, that should help. Default tree supports should work well.