so, I'm no expert, bit of hack really, but I get ideas and try them out.
I think this one is promising.
I assume you are cutting tiny squares of maskng tape, as said, that is an outstanding job at that method in 144th scale.
rather than masking the windows and painting, I tried decaling the bars with very thin strips cut from trim film. this sheet of film isnt the same color as the blue Ive painted the rest of the model, ignore that, more in a moment.

setting the strips with micro sol. theres no way I could mask that, I tried, and had to strip it off, then I tried brush painting and that had to come off too.
this looks dam good in my estimation, and was super easy.

now I just happened to have a sheet of blue trim film, and Iwas eager to try this and thought the color would be close enough. but I also have some clear film. To do this in the right color, I would spray paint a bit of the clear film, let that dry and overspray with krylon, than cut the strips from that. I havent tried that yet but I will.