They claim 4 to 12 months. I'm not sure since I spray it after every wash. It just adds that WOW factor. The clients love the gloss when they see the end results.
The soap was Maxshine Ultra foaming. The towels were from the rag company. The Rag Company - The Edgeless Pearl - Professional Microfiber Detailing Towel for Ceramic Coating Leveling and Sealant Removal, Scratch-Free with No Tags, 320gsm, 16in x 16in, Ice Grey (12-Pack) a.co/d/eoy0hOU
Nice results. How much did you charge for just the interior? I just knocked out a Camaro interior that looked identical to that condition. I haven’t decided what to charge yet.