Are 23 year old step decks safe to run?

I ended up getting a combination, since they seem to age better, be less prone to scrap metal level cracking over time. Only 10 years old.

 

Yeah I went over it very well. Some paint falling off but nothing that I can't fix with a sand blaster, primer and 2 part epoxy paint.

Once I heard you can't weld an aluminum frame with much success, I avoided it. I already know it work hardens. At least with steel you can successfully weld it to a high degree.
The one I got has ramps, and the last owner had them weld in extra gussets to hold the ramps on, so the ramp attachment is to the frame now.