Thanks, Roger and for spending all the time required to give a thorough blow by blow description of your project. I think we have all learned a bunch and received a bunch of inspiration from your efforts.
I have read all of the garage journal: that is where I found Fred's email. I will not be using the flakes since I will be doing a lot of work in my shop and my old eyes need all the help they can get when the old fumble fingers drop small items all the time. (I keep a 4" diameter magnet on a 42" handle to help me locate dropped items as it is). The Home Depot link says no longer stocked so guess I will go with Integra Flex. The one gallon should do all the joints. I will also go with the Endura Shield because of the three large doors let in a lot of sunshine when they are open. Since I am not going to use the flakes, do you think I will need the spikes?