Hi,
Don't know if this will worki in your circumstance, but the first thing I would try would be the bosses hairdryer. The theory being if fuel fumes have lifted the paint elsewhere, use the existing residual fuel in the plastic.
I am looking to paint the tank on my YZ125F, sanded & put new stickers on earlier this year stickers lasted 2 rides and fell victim to fuel. INterested in anyones experiences.