I can say that I've personally witnessed a train of r160s pull into the station covered in graffiti. And even after it's cleaned off, you can still see the leftover residue around the window rims.
So yes, those cars ofc have their own issues; but to me those conditions are still not as severe as the ones found on the line fleet. The main issue here in general is exterior cleanliness; but in the case of the Adtranz pack (R142A/188 & R143), those are also fleet issues.
The R142As are okay sometimes but other times they can be pretty bad, especially when they run constantly with little time for maintenance. That is why I feel when the r262s come in, they should put 7591-7810 on the line so they'll be able to get more rest . I know this is years down the line, but that's what I think should happen when the time comes.