Hi Wokka
Yes I did grainfill prior to applying primer as my initial intention was to just granfill and then clearcoat but I may have sanded to harshly in a few areas for some pores to still remain. I did attempt using goof off and just basic sanding to remove the glue but it didn't even make the slightest of differences, the glue appeared to be soaked into the wood rather than sitting on top of it. I'm currently rubbing wood filler with my finger into the pores and it's working great. I'm expecting to paint it blue by Friday.
Cheers, Joe