Yes, you may cut panels to length using tin snips. Use masking tape to mark the length and trim.
They're smooth to the touch. Can't get hurt rubbing hands over them.
I just used double sided mounting tape, worked perfectly.
It is only for look. It does not affect the heat at all.
Yes. Remove the existing front cover panel and side caps and this slides right over the top.
the covers rest ontop of your old ones.
No, but we have had success with cutting it shorter with a dremel. The shortest length is 3 feet.
Don't know why the price tag is high but they are well worth it especially in bathrooms where there is high volume of humidity and nothing can get to the fins to stop the airflow.
I just installed these on an 8 foot radiator. Overlapping is possible but doesn't look great. It looks cleaner to butt two piece end to end and use the trim piece sold separately to cover the joint. The metal is a thick gauge, but can be cut with a hack saw. These things look sharp and are nice, so you would want to put masking tape or something on the cover to protect it when you clamp it in the vise to cut it. If you cut it, you would really need to buy the trim piece to cover that shiny metal exposed at the cut.
there are connectors, you can join two pieces together. You can cut the pieces to fit using a hacksaw