Sanding Fillets!

I started to sand the rest of the fillets last night for 1.5 hours and will probably need a few sessions, I thought I did a good job on the fillets, but after further / closer inspection, they need a lot of work. The good thing is the chine fillets and others that I will see in the cabin area are pretty good. It's the larger fillets in the keelson / bilge area that need the most work. After the fact, I now think about some of the larger putty knives I have for drywall work. They would have helped to smooth out the large/wide fillets. I still may opt to use them and do another fillet layer, but the problem areas will be unseen. They just need to be smooth for the fiberglass.