“Some rust” is rather vague. Surface rust is typical, and the “work” could mean cleaning and applying a rust converting paint
. That’s an unpleasant but uncomplicated and inexpensive DIY project.
On the other hand if there is deep rust concentrated in vulnerable spots (particularly the bends where the rails transition to the tongue), it could require reinforcement by a professional welder. Worst case, you might have to remove the shell from the frame.
Since you did not get clarification at Scamp
, you might take a very close look yourself, paying special attention to the weak areas noted. If you see anything of concern, take it to a welding shop for evaluation.
Scamp frames have been known to break at the tongue transition. It’s more common with 16’ers, and it tends to happen with older trailers than yours, so I certainly wouldn’t go into panic mode. But have a look and tell us what you find.