What treatments are there for ingrown hair scars on breasts?

I would discuss your request with the American Burn Association.  Every state has a regional burn center for the most part.  Donation of skin is a very noble act.

I would treat this scar with subcision, fillers, PRP SC, fractional laser, and surgical scar release as part of the Hidef scar protocol in our office. Best, Dr .Karamanoukian#Realself100 Surgeon

The bump likely represents scar tissue, a cyst, or foreign body. Scar revision can help fix all of these three issues through surgical excision of the area of scar tissue.

This white scar on the lip should be excised and I would send the specimen for pathologic examination as well. 

These white and broad scars are difficult to treat.  I would begin by a series of fractional laser treatments to improve texture and camouflage color.

The upper lip scar involved dermis and there is associated redness.  I would begin treatment with pulsed dye laser followed by fractional laser resurfacing.