Peeling off the glossy plastic top layer reveals the actual matte screen protector. I just realized that the screen protector, has a screen protector-protector (no instructions on a generic budget product). But with a brand new screen and lack of skill in applying a protector, the screen would just have annoying little bubbles earlier. In retrospect, if my MBA had a screen protector to begin with, then I wouldn't have had this problem. My screen was left with small bubbles of trapped dust near the edge, but I settled because it already looked far better.

I gave up, then restarted with fresh one from the remaining 5). The downside is that you have to be really careful in applying the screen protector (my first attempt was a mess due to difficulty in aligning. The acid damage was successfully hidden, even at different viewing angles. The fix that worked for me is to hide it with a screen protector! I had some success with a generic one called '6 pack anti-glare screen protector' for about 6 pounds. The MBA screen is different and has a sort of film layer that can get peeled off by polishing solutions. I noticed a difference in reflectance next day, tried displex screen polish, but the damage became more noticeable! It was my successive applications of polishing chemicals that made the scratches more visible.

My 2 year old MBA screen was damaged by unnoticed juice splatter left between the keyboard and screen over night.

I had a similar problem, and wanted to share an alternate cheap fix.

Macbook 11 inch screen assembly repair