I get what you're saying about not being able to get your lips completely raw again and having those vertical lines. It's the same with me now ever since I used Gloves in a Bottle. I believe the dermis is healed. There are still 2 layers missing however, the epidermis and the stratum corneum. Ive found that these layers can be easily healed by simply keeping them moist with a barrier.
Right now I'm keeping my lips moisturized with aquaphor (it's been 3 days) and so far im seeing great results. Im actually seeing skin growing back.
You should really keep your lips moisturized at all times especially when sleeping so that the crusts won't form. If you see any white dead skin forming just gently brush it off without letting the lips dry out and you should start to see new skin.