>>6135485I really like this putty too, it's very simple to use as it's water-based and you can clean up dry putty with a damp paper towel to get a smooth finish. It works best for smaller gaps though, Tamiya putty and other lacquer putties are better for larger gaps that need sanding.
Also, get a good set of sanding blocks, up to at least 2000 grit, they are very handy.