It has to be cut for curves. Works great on slat surfaces.

leather wipes give some of the shine back

I spray my fender wells, cv boots, etc. with Prestone Silicone spray before riding and just rinse to remove 95% of trail gunk.

May look into the rhino lining.

Like people have been saying, color sanding first to get the surface smooth and remove the scratches, after this the plastic will be dull (and it's likely to stay pretty dull no matter what you do. The shine is from the molding process not from any polishing or buffing like acrylic enamel car paint) BUT, try to polish it as best you can with your favorite polish and a buffer as best you can, don't waste too much time, just a few minutes on each fender to remove the sanding scratches, then spray it with Turtle Wax F21 Vinyl Protectant Spray and wipe it in. Shines it up like magic. You'll need to reapply it once a month or so depending on how much you ride but it will only take a few minutes to do the whole quad and one or two bottles will last you a year. Again depending on how often you need to reapply.

Polyurethane. Better than new! Very hard to get it right though. It takes a lot of practice, but after about a week of trying mine looked like this:

I just did a Polaris 700 sportsman

Sand your plastic down go to 4000 grit if possible. Use a cross hatch sanding pattern. If you are not familiar with that it is sanding 45 degrees then making a x by sanding 45 degrees the other way. This holds paint well.

Prep the plastic Use dupont Plas-stick to clean the plastic

Now apply a coat of dupont 2330s plas-stick adhesion promoter (do not run this)

Apply a light tack coat of dupont Jamb and cut in clear allow it to tack up

Now spray the plastic with a wet coat of this clear (do not get to heavy on this)

I did three coats and glass like finish was the result.

It flexes and I have no trouble. It will scratch but this can be buffed out.

Nicest thing about this is it all comes in a can.