Few keys not working after small spill - will replacing keyboard fix?

Hello,

A very small amount of coffee was spilled on my Macbook (Unibody) keyboard. Power was switched off and battery removed shortly thereafter. A day later was powered back up and seemed to work fine but now the I K and L keys are not working. I'm wondering if putting a new keyboard on the computer (I assume by replacing the upper-body) would rectify the situation. I don't know if this sounds like a keyboard problem or a logic board problem with respect to the keys not working. I'm hoping that its a keyboard issue as I would expect that if the logic board was toast that the machine would not work at all. Does replacement of the keyboard/upper-body sound like a likely remedy?

Any insights appreciated.

Many thanks,

Ed