Re: Suggestions for coating sticky switch/buttons
A small screwdriver and a thin piece of wood for the lever and to protect the dash. then work one side off at a time. Now the bad part, If and it's a BIG IF, the switch is the separate actuator style then everything, ( spring, plunger, even the contacts) will stay in place. If not that style then everything is going to come out flying. So cup a hand over the switch and don't lose the pieces. The switch can be put back together, but if you lose anything the switch is shot.
Take a really close look at the switch panel, if you can see the springs under there then it's coming apart in pieces. Also if you can see the manufacturer and a part number you can do some goggling and know what you got.
I still think a stop at the dealer will be the best option. Carver is a great boat and they just did things right, so I'm betting the switches are able to be serviced, rather than throw away.
Don't forget there is a Carver forum here. Some more pics and info for the Carver boys and they may have some great input.