Choosing a mobile detailer in the Bay Area is like hiring a surgeon. You're letting someone work on your most visible asset. Here's the no-fluff vetting checklist.
1. IDA Certification (Non-Negotiable)
IDA = International Detailing Association. Certification means they've completed 100+ hours of training and passed a practical exam. It's not a legal requirement, but it's the only objective standard in an unregulated industry. Ask for proof. If they can't show a certificate, move on.
2. Insurance Verification
Two policies matter: Garagekeepers liability (covers damage to customer vehicles) and general liability (covers property damage to your home). Call their insurance provider and verify. If they're uninsured, a single mistake ($5,000 in paint damage) becomes your problem.
3. Product Transparency
Ask: What compound do you use? What polish? What ceramic coating brand? If they dodge the question or say "It's a proprietary blend," leave. Professionals use known brands (CarPro, Gtechniq, Gyeon, etc.) and can explain why. They're not hiding formulas; they're using industry-standard products.
4. Documented Service History
Request before-and-after photos from the last 10 jobs. Look for paint matching yours: same color family, same age of vehicle. Ask for permission to contact past customers. A five-year-old Yelp review is nice, but a three-year-old customer you can call is better.
"If a detailer has been detailing for five years and can only show two photos, something is wrong."
5. Pricing Transparency
Do they charge by vehicle size? (Sedan vs. SUV should have different pricing.) Do they quote upfront or demand a deposit before diagnosis? (Red flag.) Does the price change if they show up and find heavy contamination? (It should, but you should know the policy before booking.) Bay Area pricing should be $150–$400 for basic wash/wax, $600–$1,200 for one-step polish, and $1,200–$1,800 for multi-stage correction.
6. Review Quality Signals
Look for reviews older than two years. New 5-star reviews are easy to buy; multi-year positive feedback means customers still trust them. Check if reviews mention specific results (paint looks smooth, no swirls) vs. vague praise (nice guy, showed up on time). Vague reviews are often fake or from friends. Watch for patterns in complaints: repeated mention of swirls, missed spots, or rushed work is a signal.
7. The Red Flags Checklist
Won't name insurance provider. Can't explain what they're using on your paint. Zero online reviews or only recent reviews. Wants payment upfront before assessment. Claims to be "the best in the Bay Area" without evidence. Doesn't have a website or professional photos. Changes pricing mid-job based on "unexpected" conditions.
The Final Question
Ask: Will you warranty this service? A legitimate detailer will guarantee no additional swirls or cosmetic damage from their work for 6–12 months. If they won't, they don't stand behind their craft.
Vetting takes effort, but it protects your vehicle and your wallet. Learn more about our certification and credentials, check our warranty policy, or browse our service areas in Solano and the Bay.