Lubricant for keys

[catosim]

Hi
I'm fixing a keybed on an old Roland RD600.
Started reading about different lubricants for the plastic parts, but there seems to be many opinions about what to use.
Some suggests Silicon Greas, while other points at Lithium Grease. There are also they who only uses original grease from manufacturers like Yamaha.

Since this forum is equipped with members with great know-how, I kindly ask for your experience and advise
Which lubricant do you recommend?

[pterm]

Hi,
A suggestion:
If you disassembled the keybed, do you see any markings on the inside surfaces of the keys? These could indicate the material used so the part can be recycled. Using this would allow you to identify lubricants compatible with the plastic.. assuming of course the R600 was made after the creation of the plastic identification standards, and they comply with them.

[catosim]

Hi,
A suggestion:
If you disassembled the keybed, do you see any markings on the inside surfaces of the keys? These could indicate the material used so the part can be recycled. Using this would allow you to identify lubricants compatible with the plastic.. assuming of course the R600 was made after the creation of the plastic identification standards, and they comply with them.

No marking on the keys