LineX is no longer on Great Mills Road in LP. He moved to off of route 231 in Prince Frederick. Only place of which I know that does high quality spray on bed liners. Google is your friend for map.
Had my truck liner done by the LineX guy on 231 in 2006 when I purchased it new. Still looks as good today as it did the day he sprayed it. Good people to work with and a great product. The dealer paid for it so I can't comment on price, but if I remember correctly he was very competitive.
A co-worker had his done at the truck shop on Great Mills next to Ttreet Trenz, I think it is Trick Trucks they had another shop do it but you have to go through them.
I used the shop on 231 Prince Frederick to spray my 450, did a very good job. I have carried 5,000 lbs of rocks in that bed, all kinds of building products and tools, and nowhere has the LineX sealant failed. The metal may have dented, but the sealant is still in place. I think I paid a bit over $400 for the job. Only wish I had paid for the upgraded sealant that does not fade. While it does not look bad, when I take out the bed mounted tool box, There is a big contrast to the appearance.
Decker sold the franchise about 7 years ago. He is the vp of line X.The guy that bought it only lasted a year or so and then he sold the franchise to the guy in Prince Frederick. Trick Trucks used Decker while they were in business, not sure who he is using now. There are a few other companies out there, but personally, between the quality and warranty ,I don't think they compare to Line X.