I've seen the acetone vaper done but not sure about this as a couple of parts are for mechanical use so don't want the parts to change size - (even slightly). I will try the wet sanding approach and then paint. Does anyone know of a good primer for 3d printed parts?

Hi folks,
I have some abs 3d parts that I want to finish and paint. I am new to this and I am unsure which products are needed to achieve a smooth painted look? I am based in the UK. Can anyone point me in the right direction? Cheers

https://postimg.cc/image/xq241otx9/

the grey one looks class! I would definitely purchase one!