The VMS is flexible and easier to sand. In addition, the black color makes it easier to see what you’re removing.
Here’s a YouTube video: ‘Filling Gaps with CA Glue’
After you’ve sanded and polished the CA filler, and before final primer, it’s advisable to do a final seam check by applying Mr Surfacer 500, 1000, or 1500. Wipe that off with lacquer thinner and a cotton bud. Then sand and polish it again until you’re happy with the result.
Next YouTube video: ‘Mr Surfacer primer 500, 1000 and 1500’
Hate to say it, but before you proceed, it looks like you’ll need to do some major clean-up of most of that old putty — better to start over with a clean slate. HTH
Note: I am not affiliated with any companies or vendors.
Keep at it and good luck.
—mike 