1) do you need both the "leather oil" and the "boot preservative"?Take it from a firefighter/forester who works from the swamps to the mountains. If your boots are leather and oil tanned then you sould find and use Obenauf's. It is made from beeswax and other stuff that treats the leather kindly and still works to keep the water out. Nothing will work perfectly but this stuff will help your boots last a long time. Search for it on Google but if you have trouble let me know and I will send some links. A lot of wildland firefighter equipment sources carry this. One is the Fire Cache in Fort Collins, Colorado.