I think it looks really great! One of the things I hate about some detailing business websites is that the creator/owner crams so much onto the homepage, you just scroll and scroll down for what seems like forever with tons of information that should be reserved for tabbing and additional pages. So the fact that you're homepage is simple is great, people won't be overwhelmed because it's easy to navigate. The top graphic is a neat design, sans the little flame scroll - I think it's a little tacky and may imply that you create graphics like that on vehicles....I think it would look better with something else or possibly just the text. The little metallic is neat though.
I'm pretty sure that you work alone, but correct me if I'm wrong. For this reason I don't know if it's completely appropriate to have "we" and "us" used. Using "I" or talking about yourself in the third person would add a personal dimension to your business as people read through your site.
Finally, the word "Samples" to signify your detailing gallery isn't the best word choice IMO. Just use a word/phrase like Gallery or Previous Work.
Other than that I think you're site is awesome and I love that picture graphic on the bottom of the homepage.
Good Luck