Any profesional bedliner can be tinted to match your paint.
Linex, Ameriguard, vortex, rino liner etc. Some are softer than others and might not hold up as well. So do some research on which is best for you.
True, but a bed liner is worthless for sound deadening applications.
The stone guard will help some what but is better for protection or cosmetics. (a close friend of mine is a wurth salesman).
For noise reduction you need a coating that is both elastomeric and filled with plating mineral filler.
Lizard skin has been mentioned in this thread. They have a good product for heat and another good one for noise. Be sure to buy the right one.
I formulate all of our coatings in house so I am pretty familiar with what is required to make aquious coatings.
Let me know if you have any questions
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I am always happy to help regardless of whos product you use!
ANT