Nice to have you back. Thought you had abandoned the project. I can sympathize, with 2 kids and a full time job, it is difficult to get any modeling done (stop staring at me VF-25S, I will get to you!!)
One thing you can do for filling fine lines is to use Mr.Surfacer 500. Here is a small tutorial in case you are unfamiliar with it: http://www.swannysmodels.com/Surfacer.html
I have not been able to find the 500 locally in Montreal, but I do have the 1000 and it covers pretty well without obscuring the fine details.