I know it's not supposed to be applied on paint, but I've had good results with Son of a Gun protectant on the insert and no problems so far and I've been doing it since April in the Florida summer. You have to put a good bit on and then go over it a few times with a dry applicator to get it right, but well worth it and has UV protectant in it. As usual it doesn't last real long (but somewhat better than it does on cladding) and dust and such tends to stick to it (wipes right off) - like the cladding, with dressing on there those bug guts just wipe right off. I use it on mirrors too so bugs don't adhere to them. I'm tempted to try the Meguiar's tire gel on it, because that stuff has replaced Son of a Gun on my cladding and it is awesome. It also made my roof rack look brand new where the wind had grayed the leading edges. I have a small chip in my insert too but nothing enough to be too worried about.