Give it a chance. I think I've done 6 passes of hi fill and primer on mine and its only now starting to looks like its properly finished. I would also highly recommend giving the initial 3 coats or so a week to harden and out gas properly before continuing. Particularly with rattle can hi-fill there can be a lot of sink back. So it will look great initially and then a few months down the track once its properly cured you can see the wood grain emerging again. For someone like me who struggles with patience on things like this it can be hard, but I promise it is worth it.