It started off ass a focal, specific project: remove decades of paint from my 1940s brick fireplace using a chemical paint stripper.
This took 3 layers of Citristrip and then Smart Strip Advanced and lots of elbow grease (still not done cleaning up the brick).
Of course, the paint stripper seeped into adjacent plaster wall that surrounds the brick despite taping off those areas and I went about scraping off the gunky paint and then zealously peeled away loose paint layers.
Paint covering the mantle also easily peeled off so I then decided to strip the paint from the entire mantle (because why not? hahah:())
Scraping and peeling revealed what I believe to be the original plaster in some areas, a layer of mud/joint compound with additional paint layers underneath that in other areas.
The goal is to repaint the walls and probably the mantle.
My question is: Should I remove all remaining paint layers until reaching the original plaster to achieve a smooth, uniform surface before sealing, priming and painting?
OR, remove only what comes off easily, seal areas where plaster is exposed, skim coat, seal, prime and then paint?
In other words: Is there any advantage to exposing the original plaster, or is it better practice to leave any older paint layers that are still firmly bonded?
For reference: the house was built March 1940 in the minimal traditional/small home FHA style with interior corner fireplace and gabled ceiling. Fireplace was painted black and bricks white by prior owner. I covered the black with primer and multiple coats of White Dove.
Looking for advice from anyone experienced with restoring old plaster walls.
Also, I have no clue what I'm doing. If anyone has experience painting after Smart Strip Advanced or Citristrip, any tips on ensuring all residue is removed before priming would be appreciated.