Aluminum is metal. Hit it with a hammer and it bends just like other metals. The difference is you need to be careful not to contaminate it and to use materials, primers, filllers etc., that are meant for aluminum.
The repair tools you use on aluminum ie., stainless steel brushes, hammers, dollies, spoons etc., have to be reserved for aluminum only and not used on any other material to avoid a galvanic reaction with/on the aluminum. Bare aluminum begins to oxidize the moment it hits the air and you have to be aware and prepared to deal with this before you begin to apply any materials over it (paint, primers, fillers etc.)
It is very soft and tears and stretches easily. It does not give any visual indication that it is at it's melting point so heat has to be used with great care and reservation. One minute you are heating the panel the next you have a nice expensive aluminum puddle and silver shoes.
Unless the problem can be solved with paintless dent repair $200.00 won't cover the cost.
The Mitchell manual accessed from the home page of NSX Prime list 2.4 hours of time to paint a fender not including application of a clear coat or if it is 3-stage paint. According to the procedure pages of this manual the clear coat time of the first panel is 50% of the base time or in this case 1.2 hours.
2.4+1.2= 3.6 hours 3.6 x say $40.00 per hour comes to $144.00
before the paint, materials, tax and other required labor operations and costs.
This should be a guide to help you determine a approximate cost to repair this panel IF it can be repaired.
I would take your highest guess and add 25-50% to be safe. Better yet, ask to get a estimate from a shop you would want to repair this panel. And remember, it all depends on how greedy the repair shop is.