OK, I have to chime in even though it's the weekend and the super bowl is about to start
First, about the shop having to use thinner... I question one thing: Why didn't they wetsand the area to be painted??
First, you wetsand. After words, you use a prep agent to remove any contaminants such as any dust and any silicone or wax or any thing that can possibly get on the surface. This way, you have a virgin surface to paint on and the paint bonds to the sanded area. Only shops like Maaco and 1 Day Paint and Body spray directly over non-prepped paint. It's saves time and money - for them. The prepping phase and finishing phase are the most time consuming aspects of a re-paint.
The reason why they had to use thinner is because most of today's prep agents (which are solvent based) have to meet strict California environmental codes which allow only a certain percentage of VOC (volatile Organic Compounds). Solvents are 100% VOC. So, most prep agents are blends of water and solvent. Unfortunately, this makes for a very weak prep agent. That is why it was beading over our products which are quite durable - namely Glanz Wax.
In Europe, while VOCs are a concern and environmental regulations are stricter, they look at the big picture. Because prep agents over here are so watered-down it takes a lot more product to achieve what a higher solvent percentage -based prep agent could do. In Europe, their prep agents are 100% solvent so they use less product and get the job done the first time.
Our Glanz Wax's synthetic formulation is very durable even against road salt and therefore California regulated prep agents. That's why the shop had a hard time getting it off.
Our prep agent, Acrysol, is 100% solvent-based and therefore limited to use by shops outside of California, New York and the 5 other states that utilize the California code.
In the meantime...
As far as bonding issues are concerned, I'm going to relay directly from our chemists since they are the experts with the degree and I'm not: disregard 'bonding' issues with our product line or any other product line. And I'll leave it at that.
Our products will work fine with other well known products. Of course they always work better with our products! :xyxthumbs
Use a carnauba paste wax when durability is not an issue. But then again, carnauba is already in our Metallic Polish/Wax. Metallic contains premium white carnauba wax plus polymer wax (when I say 'polymer' I do not mean acrylic). Or you can use Express Polish (contains premium white carnauba) or Waxpolish Soft (contains the highest amount of white carnauba and polymer waxes).
Glanz Wax if you are looking for synthetic durability. Has a melting point of 280°F, is road salt resistant and tested to withstand multiple visits to the carwash--and apparently most prep agents

. Not as deep of a gloss as carnauba but you will find it very satisfactory. Great gloss, easy to apply and remove and lasts a long time.
Hope this helps.
Regards,