All I can say about this is "
good luck." This is a design defect in how the kit matches up with the body panels. I have never had my car machine washed. I only had wash my car using a 3 bucket system.
This was my thread when my paint started peeling just weeks after purchasing a brand new 2011 NISMO.
New NISMO owner and disappointed in Nissan overall
To date, this is what has happened to try and "fix" the problem.
Step One
The original OEM paint was peeling from the front and rear bumpers and both side skirts. Under warranty the original dealer "fixed" the defect by repainting the parts. The color match was horrible and it started peeling soon after. I spent about a month going to several body shops to determine the problem. The final determination was the dealer did not properly prep or respray the kit. The work was completely botched. Saying I was extremely upset was an understatement.
Step Two
After much discussion I got Nissan NA to send an engineer to the original dealer to evaluate the paint on my car. The final decision was for Nissan to supply a brand new NISMO kit and a repaint at the body shop of my choice under warranty. This made me happy that Nissan was going to make it right.
Step Three
I picked a highly reputable Nissan dealership body shop in DFW after much searching. Even though there are Nissan/Infinity body shops right near my home, I picked this one on recommendations from the industry. This body shop painted and fitted a brand new NISMO kit to my 370. They had the car about 3 weeks and I was confident it would be right.
The body shop manager had to consult with PPG directly to get the right color match. It took 3 different sprays, but the body shop got a very good paint match. I learned more about Nissan Pearl White QAB then I ever wanted to know. After this experience, I will never purchase a color with pearl again. It is just too hard to match.
Step Four
After several weeks, the paint start rolling up in the exact same place on the rear bumper. I drove the 40+ miles back to the body shop and they are going to repaint it again under warranty. There have been several hail storms this summer in DFW, so I have been waiting on an open time frame to take the car back. During this wait, parts of the front bumper where it meets the fenders and head lights has started the peel again. Luckily, both side skirts appears to be peel free.
I have had the car a little over a year w/17k miles and this is what I have gone thought to try and solve the defective paint problems. Like I said, I believe this is a design defect and after multiple resprays including brand new OEM parts, I still have the same damn paint peel problem.
I have to give the 2nd dealership credit because they have genuinely tried to fix the defective paint problems.
So like I said at the beginning of this long winded post,
good luck.