To spray or brush, that is the question

[RMcG]

I have some rusted scratches that I want to touch up, see attached pictures.. The pictures from top to bottom are (1) door scratch closeup & wide shot, (2) window frame scratch closeup & wide shot and (3) hatch scratch closeup & wide shot. The paint on the door and the window frame are not scratches per se, the paint is actually cracked there. I think the paint on the hatch was rubbed off by a bike rack. I am unsure if I should: (1) buy spray cans for the rusted scratches, mask the scratches to protect from over spray and then spray the scratches or (2) use a small bottle with a brush. (By the way, I plan to use rubbing compound to remove the white paint on the door. It's a long & somewhat embarrassing story, but I got too close to a painted white pillar supporting a canopy in a parking lot.)

QUESTION: Does anybody have an opinion about whether one method or the other is better (for one or more of the pictured scratches)?

Somebody at an auto paint store suggested paint from a can could be sprayed into a cup and then applied to a car body with a brush.

QUESTION Can primer paint and/or base color paint can be sprayed into a cup and the applied with a brush?

If I can spray paint into a cup and then apply it with a brush, then I could buy spray cans and either spray it in areas that need touch up or apply it with a brush. In addition, there are some larger areas on the body that could probably benefit from being sprayed. if I buy a spray can, I could spray these larger areas later with the spray can. I am thinking I can buy a small brush somewhere, perhaps even the kind of brush that women use to paint their finger nails and toe nails would work or a brush from an art supply store.

Thanks,

R.

DoorScratchCloseup.jpg

DoorScratchWideShot.jpg

WindowFrameScratchCloseup.jpg

WindowFrameScratchWideShot.jpg

HatchScratchCloseup.jpg

HatchScratchWideShot.jpg