I use Tamiya fine primer in white or gray and it adhere great. One you have that on the model you can use a hole range of paints.
Below is a model jet engine I printed /made (not printed on the Zortrax) which is painted with Rustoleum all purpose indoor/outdoor paint and Rustoleum Metallic.
I’ll pop over to the Hobby store and pick up a can.
btw, that’s the most beautiful Jet Engine i’ve ever seen
Ummm… Not seeing an engine…
You better print one on the Zortrax!!
Looks really good David! Can’t even tell it was printed from the photos.