White PVC Patio doors - painted black 'Aluminum' look

I haven’t personally but I’ve seen quite a few where they have used spray companies to do this and they look good

kolorbond.co.uk/

Prep and paint. Scorch pad and clean. Important to really clean surfaces

Pros spray but you can brush and roller. I'd consider getting the paint in spray cans. Warm the can in hot water and will spray nicely.

I think WRX is another that sell paint in spray cans in RAL colours that will do job

I’ve seen lots on YouTube and TikTok and lists of the use Zinser primer and paint. I haven’t tried it myself yet!

PlastiDip, will need a primer as well. Thank me later.