I do have Alden Leather Defender also I only apply it if there is a good chance of rain. It is very light and doesn't seem to last long at all. Some on here have used Sno Seal on shell but the pictures of their boots after awhile show the toe box liner, it causes something to happen to the shell and I don't care for the look. I use a lot of Obenauf's HDLP but only on chrome tanned cowhide, CXL and my AE Black Hills. It isn't for dress shoes or boots IMO. Old fashioned paste wax helps as much or more than anything IME. I don't worry so much about the weather and most of my shell. Although I do have a few that will get welts but they always go away after awhile so I am careful of those. I have 2 pair of shell that I wear casually and in rain and mud. The Patriot's here are still soaked from wearing them in the yard and the boots were worn in the rain and mud shooting sporting clays a couple of weekends ago. But they always clean up well with just normal care of wiping with a damp cloth and then brushing. I have never used any product on these other than Reno.