I assume you are talking about the three dimensionally curved aluminum just above the front window (this section is known as an "end-cap"). If so, these are refered to as "segments" and are formed/stretched/shaped over a die (rather than just being a flat sheet that is bent around a curve). The difficulty here is that you can't just buy new segments for a 60's vintage trailer. Your choices are 1) repair your existing segments 2) find some used/salvage ones that are in better condition and replace yours, and 3) have some brand new ones manufactured by some kind of artist with an English wheel.
Of the three options above, #1 is your best bet. #2 will require an exhaustive search for end cap segments that are in better condition than yours, expensive shipping, and you still have the challenge of riveting segments into place on your trailer when both sheets already have rivet holes in them, and they aren't going to match up. #3 is probably the most expensive and the most difficult to execute. People just don't master the English Wheel like they did in 1800's.
For #1, start out by exhausting any "paintless" dent removal technique you can find. In other words, do everything you can to "pull" the dents out without removing the segments from the trailer. If the repair can not be achieved to your satisfaction, the next step could be to remove the interior on the back side of your dents and try to beat them out with a rubber mallet, using a sand bag on the outside as an "anvil," or to get a "dent roller" and try to work them out from the inside without creating any additional damage. If this doesn't work to your satisfaction, then the next thing to do would be to remove the segments, find someone with an English Wheel and even just a little bit of talent, and have the dents worked out of your segments.
You can do a google search from outside the Forums with search terms like "airforums dent paintless" to see some threads showing what some of us have tried to remove dents. If you end up having to do serious deconstruction/segment replacement, then you can do the work yourself, depending on how brave/handy you are, but get ready to invest some money in tools, and some time in the activity. There are plenty of Airstream rennovation businesses, and probably dealers who could do the work as well. Rough estimate I have heard for costs are upwards of $1000 per segment, very ballpark.
good luck!
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