Partner Stove Burners
The burners are probably the ONLY part of the Partner susceptible to damage from the elements over time, i.e., they are stainless, but with all the heat they're subjected to, they do tend to rust over time. Thus, I wouldn't be carrying mine in a drop-bag where it gets repeatedly doused.
BTW, also recommend unscrewing the burners annually and laying some anti-seize on the threads. After about several seasons, if they do rust, they'll be hard to take off for replacement.
Outside of that and occassional o-ring replacement, have never had a Partner stove repair issue ever. Been carrying mine for 12+ years and it was 10 years old when I got it. Had it rebuilt at Partner and still runs fine.