3D Printing bike parts - lugs, brackets etc

Have recently started experimenting with 3D printing plastics (PETG etc) and metals (Aluminium, staineless steel), outsourced of course. So far I’ve been using Craftcloud which has worked out well.

What other suppiers have people had sucess with?

And for bike building purposes what post printing processes do you do such as anodising, sealing, polishing, bead blasting to give a long lasting part?

Look forward to peoples insight, thanks