Help with Armour Effects

You can make a procedure in the armor's update tick that adds a second or two of the effect to the player when worn. Then, it'll wear off very quickly when it's taken off. (There are more complicated ways of doing this with variables, but if you don't mind a very slight delay, it'll work fine.) 

The procedure triggers on update tick. That means every tick, (every twentieth of a second), it will reset the effect timer to two seconds. When the player is no longer wearing the armor, the procedure no longer runs, and the effect wears off.

You could just do something like this, just input the armor piece you want. It's more efficient to just link the procedure to the armor item itself, but this procedure will run on its own.