I have recently used different chemicals to restore, refinish and treat various types of wall and millwork surfaces. E.g. I have stripped old paint using Peel Away 1 from plaster and antique millwork, which I believe is basic and needs to be neutralized with acid (vinegar or similar). I also cleaned mortar and dust residues from exposed brick using hydrochloric acid, which I neutralized with a baking soda solution (basic). In yet another example, I plastered some brick walls with a homemade plaster mix (hydraulic lime + sand), which also is basic.
After completing all of these surface treatments, should I always aim to achieve a pH of 7 by neutralizing with a solution of the opposite pH? Or are there other factors to be taken into consideration?