Bandai kits had warnings against the use of lacquer paints on some of the mg kits for the abs parts due to reports of problems with the inner frame. The sinanju original kit was one example that people were reporting on the hobby forums. From what I understand the second release, I believe it was the anime Edition that came with the "paintable frame." On newer kits they use a new formula that is safer for painting. I am not sure if bandai uses that formula on their toys for the abs. Some of the Arcadia owners on the hobby forums that painted them reported fragile parts due to the paints, but that could have been due to other problems. I think the tamiya paints and top coat are acrylic and may be safer, but may rub off easier. On the new 1s hmr I would like to see how the arrow decals from a 1/100 kit would look on the head, If other people report no problems with the top coat i will try it out
From my experience the testors lacquer dull coat is usually a fine product, maybe the best product testors has made. Their top coat seams to be slightly less aggressive on plastics than mr hobby, so it may be safer to use.