Cars get brutally hot in the summer, turning your cabin into an oven and wearing down your interior. Adding ceramic tint cuts down heat fast, but shop rates spike when the weather turns warm in late spring. Getting it done in late winter keeps shop prices soft before the rush starts.
A solid ceramic job for the whole car usually runs about $500. Instead of dropping that cash in one chunk, you can split it into small payments over time.
Remember that the zero-percent intro window is a deadline, not free money. Pay off the balance before your 15 months are up, or regular interest rates will apply to whatever balance remains.