@ DJ , I use Squadron putty for the turret, and remove it after dry time (we are in summer here) with a 1000 & 2500 wet sandpaper. (1000 and 2500 refers to "Norton" brand, I mean very smooth). As I need to fill own and kit mistakes.
For the rest of the "putty" (see white areas) I use "Liquid paper" when I need to fill small gaps. To clean it up, you can use alchool with a cotton swap.
@Al & DJ , thanks for looking and words.
Regards Alvaro,
(PS: small progress, I also like the beach! )