I bought my Downtown last year, it was 2011 model so used.
During summer season I used every day, so I don't have to much time for disassembly and repair.
What I found just minor problems which I repaired immediately.
But I like my bike clean therefore the old plastic elements need to refresh every week or two with spray(silicone+etc.)
Oktober -november the wheather was very friendly to us, I don't clean to much and cold mornings are wet a bit.
The plastic elements become greyish.
January cold, snowy and wet, who want to ride, so I start long journey in the garage, I want to replace all the necessary things and parts, because I hope this summer also long.
Disassembled many things, right know the plastic elements. I use heat gun what I see on youtube.
Please check pictures, i think the job well done
First picture shows the differencies between two elements which reconditioned (small central lover cover) and around the greyish old one.