It depends on the vehicle. I am assuming that you are talking about a Sahara. My understanding, and anyone can flame me if I'm wrong, is that the fender paint is the color code of the vehicle, and they are the same. This is different than a Sport or SE where the fenders are black. It is best to list the year and make, in your OP, just in case the fenders were painted on a Sport.
If you have lots of pebble marks, or you don't want that touch up look, a glop of paint, I would get a Spray Paint Can(color coded of course), and a Can of the Gloss Overcoat, lightly wet sand the area (2000 grit), paper and taped off a small section around the scratch, and Spray it. Then after it dries, apply the gloss overcoat. This way it will not look like a touch up.
Just one word of caution: if you go by the color code on the door, it may not match the rest of the jeep because of fading issues. I had some body work done to my steel fenders (not the flares) due to rust earlier this year, told my body man to use the paint code and big difference aftwards(not happy). Talked to another shop about my delima and they used these colors on cards to try matching it up (another option for faded colors is to use a special camera that is able to custom match your faded on computer afterwards which most newer shops have). Found a better color to work with and had my guy re-paint them and came out much closer(much happier).
Yes, I agree that when you get the Spray Can of Touch Up, it is best to test the color before you apply it. It is also going to look much better once you apply the Gloss coat too. The Good thing is that if you don't like the color, you can remove it by dipping a towel or paper towel in Acetone, and quickly and lightly brushing the area. I would do this before you gloss coat it though.
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