Finding a "professional" car detailer is like finding an honest and reasonable plumber.... Almost impossible!! That's why I've always done it myself. In choosing a detailer, I think a background in automotive restoration and competitive national-level showing is a must, otherwise they just don't "get it", they have no proper frame of reference or standard of excellence. Nor do they understand how to treat delicate and irreplaceable surfaces. Finding a detailer with that kind of mindset and experience, as I said, is near impossible (note, I said "near" impossible, there are some sharp detailers out there). I didn't realize that products were tough to come by in Greece. But as I said, most products are good enough, it's the manner in which they are used that really counts. Have fun!!