Not sure which areas you want to paint for touch up?
Behind the 4 wheels low to touch up rock chips you will be OK.
Other in your face areas can take some extreme talent to get it to look like it matches.
Paint to match. Panel paint areas with break off points that are not obvious to the eye. Lots of times you have to paint the whole side of the car breaking it off at the top fender ridge.
There is a trick called reverse masking that helps when stoping at a sharp peak, takes practice to get it to lay just right.
Buff up your old area with rubbing compound to get off oxidized top layer of paint and clean it so it shines again, then can blend into that. Blending with base coat then over blending with the clearcoat helps to hide the area of transission of old paint to new and helps to hide the dry overspray edge of the color coat.
Spot painting in the middle of a panel is not a good idea, can look worse than just leaving whatever minor damage is there.
Careful, Careful.....
There was an area here on this '72 Duster where the original paint on the roof had rubbed through to the red oxide base primer, was nasty to look at.
Lightly cleaned the roof with rubbing compound and distilled water to thin it, then wiped it clean. Masked off windshield and back glass and driver's side at roofline.
Got ahold of some mixed to match basecoat from PPG, had to add some silver metallic basecoat to get the color closer.
Then did a dry spot paint over red wore through area blending it ever so carefully into surrounding areas, then washed in the edges with basecoat reducer to help hide the dry overspray edge.
Let that dry with no clear, and gave it an ever so light rub a few days later after it had hardened up more.
There was an adhesion problem that if you put tape on the original paint it would peel it off, so that made it even more challenging to work around.
Ended up with an acceptable spot repair, not perfect but visually pleasing to the eye.
He wanted to save his original good paint job and was not interested In spending 15k for a strip and repaint.
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Had mentioned that this could turn out to be a mess if it did not work, he said go for it "I am tired of looking at the red primer spot".
5 years ago and still holding up well.
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