Paint touch up questions

[44th Miss Inf]

Need to do a few spots of touch up on my 87, the biggest is a spot about 2” by 6” on the door, where the paint pulled off while removing the old trim.

I would like to mask it off, and just repaint that area. There are only about 4-5 spots on the whole truck that is down to primer. Truck is and 87 with what I believe is mostly the original 5118 black paint.

Had they went to BC/CC paint yet? Since I’m unsure of what type of paint is used, what prep work / materials would you recommend?

Truck has been well taken care of over the years so except for the few mentioned spots, I feel a full repaint is not needed.

I’m no body man, just a DIYer, but have painted a few vehicles, though the last was about 20 years ago.

Thanks for any advice offered