LOVE the front. For me, the back is a little "too busy" for a tee. I just googled "Lustrous Detail" and saw results for your business. Soooo, you might be able to drop the website address and be fine.
Looks great! I'm not a pro, but you might try "stacking" the web address so it can be seen better--that or take away the "www" since that's always implied/your site will pull up whether someone types the first 3 w's or not.
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