In attempt to solve the problem with the decals, I tried to use Pledge on a few of the stencils. It turned out quite well and I think I’ll use the same method for the rest of the decals.
Meanwhile i glued rocket launchers, bombs and rear wheel.

Shortly after I also added tank and landing gears.

There I left it to dry over night.
Next to do is the rest of the decals before I paint it all with Pledge, then antenna and gun barrels and a few glass pieces needs to go on as well.