but you will probably have to go in and clean the parts thoroughly and relube later for a permanent fix.
As you suspect, the WD-40 will probably eventually evaporate and the original lube resolidify and stick the followers to the shaft and to each other again.
But hey, it won't hurt a thing to just let it work as long as it will and worry about re-repair later.
BTW, the one cam follower determines where the tonearm sets down for 12" or 7" records and the other one holds the tonearm at the rest after the last record is played and the table shuts off.
And welcome to VE!