Considering that Ibanez necks are not very thick (19mm the wizard) try to not sand it, because you're going to reach to the truss rod.
To take out the dents that are on the wood, try to put some water there and with an iron heat the wood, that will make the wood to expand.
and some places that are big dents try withe the same method and if you see that you can't solve it that way, use some wood dust + epoxy, that will fix it. Then sand it and it will look very good.
Frank.