In my opinion no, I base that on the fact that you will not be switching them very often.
The difficulty with using AC switches with DC lies in the fact that DC is hard to interrupt, when you open the switch an arc follows the contact as it opens. In AC there is zero volts 50/60 times per second which helps break the arc. DC switches have a longer break gap and stronger springs, generally.
My advice would be to feel the switches in service and if they are not hot then a good contact is being made, AC switches generally have less spring tension than DC.
allan down under