If there is a clear coat on the truck, a good scuffing with a compound and another shot of clear could save the paint. But if the paint is oxidized, then your out of luck. Have you tried a deep cutting wax with a high speed buffer? I asked the shop owner what he would charge for refreshing some paint and a clear coat and he said it would run several hundred to a grand with labor, cost of materials, etc. which for that cost you could probably get a full maaco paint job.