[stevenoble]

I use Isopon automotive 2 part fillers and they are great. No shrinkage at all, easy to sand and shape. Much, much better than any model putty I've used. I also use superglue, the thick gap filling kind and set it either with an activator or by sprinkling baking powder onto it. Try it, it sounds silly but it works a treat. Once I've done the main filling, I prime, then apply 3m Acryl Glazing putty, which dries very fast and takes care of any little pinholes left behind that the first filler missed.