Don't try to make it look better in any way.. Leave it as is! Appearance is not important.. The variety is!
Nice doubling. It's cool to see someone post with such good images that you can actually see the doubling.
You're correct. Cleaning is one of those areas that is best left to those with experience and that's no guarantee that they won't screw something up. In some ways, it’s like painting a car. If you have a 10 year old Honda with 150,000 miles, then it really doesn't matter if there is a little overspray or color doesn’t perfectly match the rest of the panels. Close enough is more than adequate. However, if you’re repairing a classic Corvette or Ferrari, then you better make darn sure you know what you’re doing, or you’ll lose a lot of value. Best advice: If you’re not sure, then don’t. FWIW: If you want to experiment, practice on pocket change that’s only worth face value, not potentially valuable coins