2000 grit is not fine enough and will require excessive compound buffing. Find a small new pc of acrylic and buff the 2000 grit like you did on your tank and then compound buff like you did and compare results. If the haze is the same size then you need to go finer or more compound buffing. If theres no haze on the sample acrylic then you missed some courser prior steps. I have the Lifeguard Scratch Removal Kit by LifeGard Aquatics way back when and it goes up to 12,000 grit. Here's a pic of the kit. Hope this helps
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