Just recently saw this posted on FB so thought I would give it a try. Don't know how bad it is on the H2 but the black trim on H3s fades really bad, especially the a-pillar pieces. I have tried all kinds of products from Back to Black to peanut oil and while it looks good for a while fades again pretty quickly. I will post up down the road how the results lasted and I am not guaranteeing anything so try at your on risk as you could actually damage the trim.
Take a heat gun to the trim and it will heat up restoring the black color. It doesn't give the most even coverage but you can go back over areas that need more heat. Just don't heat it up too much so you don't actually damage it.
Here is how the driver side looked before I started. Hadn't done anything to it in at least a year. It's sprinkling, that's why it's spotting.
Here it is with the front face done to compare to the side. Sorry, a bit blurry. This is also before I went back and evened it up a bit.
Compare the passenger side which is already done versus the driver side before I started.
Pull the door seal off so you can better access the trim and not worry about damaging it. Did the entire way along the roof a well (passenger side so far) but it didn't seem to do much on the very back which must be slightly different. Of course it doesn't fade nearly as bad as the rest. Give it a shot if you want but do it with care. Once it stops raining again I'll finish up the driver side.