So the Sienna is looking pretty beat up, what with rock chips, little bits of surface rust, nicks, scratches, etc

Dropped by our local, very reliable body shop, was told that a re-paint would be $2,500-$5,000 depending on any issues that come up as they strip stuff off; but they figure our van would be in the lower end of the range as there are no dents or significant rust. And we would not be changing colour, so no need to re-paint inside areas of doors, etc.
So figure maybe $3,500 for a complete re-paint. Is it worth it?
The facts:
2004 Toyota Sienna CE (base model), with just over 100,000 kms. No significant mechanical issues to date, has been very reliable. Bought new, with a plan to keep it for 12-15 years. No money owed on it, no warranty either. The hood, leading edge of the roof, both front fenders, all 4 doors, both rear quarter panels especially the wheel arches, front and rear bumpers all have paint issues. The only thing that would not need re-paint is the rear hatch

So what would you do? Leave it alone, re-paint or

?? Not even sure what other options there are besides a replacement which is not likely right now.
Thanks, Tman