Cars are expensive to keep on the road once you tally up gas, insurance, and routine maintenance. If you want to add ceramic tint to block heat and protect your interior, plan the upgrade for late autumn or winter. Detail shops slow down when the weather cools off, making them far more willing to discount their labor.
Work out your best out-of-the-door price with the shop before you talk about payment. Once you have a firm quote, you can use a zero-interest credit card window to spread out the cost instead of draining your cash reserve all at once.
Remember that a 0% intro period is a strict deadline, not free money. If you still carry a balance on your Citi Simplicity® Credit Card after 18 months, regular interest rates will apply to whatever amount remains.