Hello BruceWP, I've never heard of anyone painting their swords gold. It so unusual it would make me run in the opposite direction. In addition to the practical aspects of a soldier securing gold paint 70 years ago, it would be counter-intuitive to have a sword scabbard that would stand out, both for aesthetic reasons and camouflage reasons. Seems very odd indeed.
The two swords in the right of the picture seem to be Type-95 swords. But the gold and silver paint makes me think they are either fake, or they were victim to someone thinking that a bit of gold paint would enhance their value. Mind you I'm judging them just by the outward appearance of the furnishings, so take my comments for what they are worth.
You may also try your luck at the Nihonto Message Board, which sees a lot of bizarre things in its forums. But the gents there probably will not think too highly of gunto that has been decorated with gold paint.
https://en.wikipedia.org/wiki/Guntō
昭和10年制定陸軍九五式軍刀 Non-commissioned officers Gunto 1935/title>