Quote Originally Posted by fatpanda View Post
I am really curious about how facial hair can actually deform steel! I am a civil engineer and I remember some material laboratories in undergrad where we would yank on a steel bar until it yielded and eventually snapped. A Ton of force! How on earth can facial hair deform a blade? Is facial hair harder than steel?
Pressure (symbol: p or P) is the total force acting across (not along) a surface divided by the area of the surface. And a razor's edge is microscopic.

Quote Originally Posted by fatpanda View Post
Anyways, I have 4 blades here that I am sure I will be rotating according to my heart's content! The more important issue that I am wondering about is if different grinds feel different on a strop (say a wedge vs full hollow)?
They give different feedback, and make different sounds. You might find the following passage useful: Razor stropping - Straight Razor Place Wiki

Quote Originally Posted by fatpanda View Post
Also, when learning how to shave with different grinds, is there a big difference between say a wedge and a full hollow?
There is for me, the main difference being feedback. A wedge will give you next to zero, because it does not flex, or sing. This caused me to apply more pressure initially ("Hm. Doesn't make a sound, doesn't really respond. Let's try harder. Ouch, that bleeds.").

Quote Originally Posted by fatpanda View Post
should extra attention go into the shave when changing grinds?
Initially, I think you should, and instinctively will. Wedges can be serious fun, once properly honed.