Here's another option to consider:
Good stuff, all. Here's another alternative that won't risk devaluing your current protection product.
Develop a bundled process of protection and sell additional benefits, features and advantages. We did it quite successfully for years in my upscale detail operations and offered the customer a choice of upgrading from a single product to a more elaborate level of protection. No guarantees or time-limits suggested. Just logic combined with perception.
Combine the many benefits of chemical polymers from one product and layer it with the classic protection of Carnauba as a topcoat. The total result becomes greater than the sum of its parts. Durability, shine, improved DOI (distinction of image) and a slippery outer-coat that inhibits stone chips and scratches. The magic is in the story and its presentation of factual information combined with the consumer's comfort level of a logical conclusion.
Keep in mind that the process requires an additional step, but the task takes only minutes to achieve.
Rather than selling the merits of a single premium product, simply offer the additional level that increases the safeguard protection package. You've moved the customer from a single product leap of faith... to a combination process that makes logical sense in their value equation.
-Steve