I would be more kind than saying "spy". I was thinking a do-it-yourselfer. However, I'm sure the formula and process are patented.
If you want to SEE the process and SPEAK to someone during a tour, I know our AIChE local section has toured BP Solar in Frederick, MD. If you want to set it up, I can give you the contact name but it's up to them to accept. Respond to me off-line at brian.rutledge@martinmarietta.com for details. PS I'll be out of town on business next week, so it will be a few days intil I can check the business card file and give you the contact name.
PS the part of the plant where the surface treatments are formulated was secure and off-tour, but they will answer some questions.