I still have my 8th gen. I've never had this issue. I'd say tape off your rear glass, wet sand that, and use touch-up paint. If you use aerosol, mask of the entire rear glass, trunk lid, roof, and quarter panel. That edge would be a great cutoff point for your masking tape. You always want to mask off your paint area at the closest straight edge where ever possible. And since that frame is a straight edge, you're golden! Additionally, there's no need to feather it (which I wouldn't recommend anyways because it's hard to get right). Masking off the car would take the longest for you.
Personally, I use Automotive Touchup (Microfinish LLC) for my paint needs. Their aerosols are no joke. They cost $20 +shipping, but their nozzles don't spit and splatter like the terrible Rustoleum products you see at Home Depot that never get the job done right.. And stay away from Dupli-Color 10 oz clear coat aerosols. They are worth as much as a trash can, you get barely enough product to cover a headlight! Spend the $$ on Automotive Touchup clear coat. I learned the hard way.
Same. 2015 Si Sedan, Tafetta White. Started around the rear window and now there's some visible flaking around the front window too. It's actually getting so bad that there's a good portion of the paint on my roof missing.
It's quite depressing because I've tried to maintain the paint pretty well (claybar, wax, polish, etc. twice a year) but apparently the paint is allowed to just peel off because Honda doesn't do a good job? I'm convinced this is a common problem for these cars and I hope they'll extend a warranty for this color on the 9th gens. I'm not sure how I can help make this happen though.
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