Yeah, probably, but I had over half a can left from previous scoot that needed
it twice/month so 3 months doesn't sound bad at all.
Try it out, but essentialy, it's a waste of time and money.
I sprayed all of my scooters' cans from the moment they started rusting - this spray, that spray, sanding and grinding - nothing really helps, they always rust, no matter the make of the scooter and build quality.
Leave it as it is, nothing bad will happen to the scoot, except your vanity will be a bit hurt.