I'm confused, because the benefit of Powder Coating, is heat resistant non-anodized coloring. If you had a good powder coating job, it wouldn't be cracking. Most paint will crack under heat, but a true, quality powder coating job won't.
There is three options
A. - Spray paint when needed.
B. - Get your tips anodized (expensive)
C. - Get a quality powder coating job
My recommendation, C. Is to get a better more quality job done.
2011 BMW X5//M
2008 E90 M3 - 6MT - AA Gen 2 Level 3
1991 Hot Girlfriend