>>> By color repairs, do you mean to sand smooth the damaged leather, apply leather paint, then apply topcoat and protector B?
Yes!
>>> What’s the difference between leather dye removal and prep7.7? I saw it on the website for dye removal, but the aniline matrix only has prep4.4?
All three can be removed to some degree. Prep-4.4 has a pH value of 4.4 safer than Prep-7.7. LeatherDyeRemover-7.9 proves to be more effective for removing dyestuff. Ballpoint ink would need Prep-4.4 first to remove the grease then the dye component is removed by LeatherDyeRemover-7.9 > Acidifier-2.0 system.
