springer1521- Welcome to Autopia!
Never tried that combo, but I can think of two potential issues (dunno if either will happen though): 1) the solvents in the 845 might compromise the #26, 2) the high oil content of the #26 might cause issues with the 845 bonding.
All-in-all, I'd choose one or the other. Generally the last product gives the looks and these are two rather different looking waxes; I suspect you'll like one or the other better.
The #26 will probably give a deeper/richer look, but the 845 will look brighter/more reflective. The 845 will bead and last a lot better.
You might consider applying the 845, see how you like the look, and then apply the #26 to see if you like that better. Then you could refresh the #26 from time to time while the 845 will continue to maintain a good protective base layer.