I try my best not to drag my boat but sometimes especially when I'm on my own I occasionally have to drag it to get it into the truck etc. I noticed today I am starting to develop a pretty significant spot just below my bow that has taken a beating from this. I'm a teacher so I have been using the heck out of my boat this summer so I am mainly concerned about longevity not looks. It's a ride 135 I would imagine that is a pretty thick part of the boat.

Should I be concerned, and is there anything I can put on or over it?

Get a kayak cart/dolly. Or build one from PVC. They're cheap enough to build. Anything to get it off the ground. Palmetto Kayak has detailed instructions to build one from PVC.

Some rash is normal and OK but the hull is only so thick and if you wear on it every time you move it eventually it will leak. My 115x has a replaceable skid plate below the stern so if I have to do any dragging I take advantage of it but never on concrete or other hard surfaces. Kayak cart is the way to go to minimize dragging and I personally like the C-Tug cart by Railblaza if you have the funds for it.

Yeah I like the palmetto one it's pretty cool I was planning on building one soon. It's kinda hard to believe how expensive the pre-fabed ones are.

I guess I'll just need to change my no cart ways and the rash will just show that my yak does more than sit in the garage.

Speaking from experience, you don't want to drag your boat around. Last year, around April, I set out on about a 5 mile touring paddle. Initial everything seemed good. About 2 miles in I notice the boat seemed very sluggish. About this time, a pleasure boat kicked up a wave. I tried to turn into it and failed. The wave hit my yak broadside. Normally not a problem but on this day, unknown to me, my boat had taken on water from a worn spot in the keel. My kayak capsized in about 20' of water. I wasn't able to right the boat. I was about 200 yards from shore. I dragged my boat and gear to shore, a trip that took about 40 minutes. Fortunately, my cell was in a dry-box. I was able to call a friend to meet me nearby. Learned a good lesson that day. The repair to my boat cost about the same of a cart.