Hah, nice problem to have
Sry to hear the kit is so bad, cutting, sanding, filling.. it has been some time i built a kit from Revell or Airfix. I found that kits differ very much in cast quality, plastic quality, and details.
I built (or tried) Airfix' B17 two times because i thought that there was something wrong with the plastic material - it was impossible to glue parts together with polystyrene glue, also they would come apart days or weeks later. Second kit was as bad as the first and i gave up, but this was 40 years ago lol.
I found the later ItalAerei models manufactured by someone else but sold by Revell to have a very good quality overall, and then of course there is Wingnuts by Peter Jackson (!!) as the shiny example.
How do you glue those chrome-plated parts, or does one generally use superglue instead of polystyrene glue nowadays?
Whatever, wish you fun and good luck with the project