Ok, thanks a lot for your replies!

So 2 pack it is

Do you think it s usefull to prome using spray cans and leave a bodyshop to paint things? Or will my sprayed on primer be more hassele for them?

I am a bit worried about working on the car and leaving the metal unprotected for to long, anyone got any tips. I thought about one of those giant airbags (park car in it blow it up kinda thing) to seperate it from the elements