Can there be methods for preserving/ healing tooth enamel from further acid erosion?

Yes: Restrict acidic food / liquid intake; be checked out to make sure you are not suffering from gerd / reflux. Have your dentist prescribe mi paste or equivalent. Hope this helps.

Acid: Some tooth paste claim to strengthen enamel but nothing will replace it. Stop the source of the acid and then get the damage repaired. Depending on the extent, there are multiple options, many conservative. See a qualified dentist.

Change your diet: You need to reduce the acids that you consume to prevent tooth erosion. Things like soda, diet sodas, energy drink, iced teas, juices sipped frequently can be very destructive to teeth. Talk to your dentist about mi paste. Sometimes the only thing that you can do is to rebuild your teeth.

Acid Erosion: Acids that erode our tooth structure come from a couple sources. The mian being the food we eat, citric acid in fruit, carbonic acid in soft drinks...The other being from foods we eat that the bacterial flora in our mouth thrive on and a byproduct of their digestion is acid. So limiting you teeth to acid exposure is the key, reducing acidic foods and complete and thorough homecare 2x/day can do it.

Dental erosion: 1st you need to identify the cause(s). It may be from acidic foods ; beverages. Sports drinks are notorious for the amount of acids in them. Gerd and GI problems may play a role as well as eating disorders such as bulimia. Some people suck on tic-tacs or mints all day long. Sipping soda or coffee\tea with extra sugar? Many restorative options for repair. Speak to your dentist for diagnosis\repair.

Yes: In my opinion anything is acceptable to eat during meals, with moderation. However, once the meal is done i suggest rinsing with water if you cannot brush. Between meals anything other than water can contain sugars or acids which can lead to erosion. I suggest minimizing long-term contact with anything other than water. Mi paste is a special product that can rebuild the teeth.