bc, Hy is not just a salesman for Peel Away, he is President of the company. Having talked to him, I think that he has a pretty good feel for what his products will do.
As you may know, I also answer most of the questions for a competing stripper's board, but one with a citris odor. I occasionally tell people there to use Peel Away. The board sponsors may not like it but that's why I advise for free there too.
I have used Peel Away 1 on wood and it did a good job. There were about a million coats of paint, it seemed, and the Peel Away worked but I finished and got all the stuff out of the cracks and crevises with the citris product. I haven't stripped any brick, but I think the same technique would work there too. There is no question that Peel Away 1 will work on concrete and similar materials.
You can buy Peel Away 7 at Sherwin Williams stores but they may have to order it. As far as I am concerned, both types of stripper are good and I do try to steer them away from those containing methyl chloride.