In 50 years of "modern" modeling, anything gloss has never seen armor I've built. Like others, the supplies then were way different than they are now (which is a good thing). Decals always seem to be just fine settling on the rough texture of the matte paint...sometimes using Solvaset to maybe put down a corner or two. Knowing PE needs to be primed, I then starting using primers way back when as well.
Staying with what works for me, Testor's Dullcote was, and still is, my maintaining a uniform "sealing' coat once the main portion of painting is done. Then worry free detailing, washing, takes place. Not that I'm an expert in painting by any means, its that I just found what works for me, and have stayed with it all these decades.
Grab handles and lift rings are always done with brass and/or steel rod. Just another area where it provides better security for not breaking parts off, and you can tell the difference between metal and plastic.
Headlight shells were always painted silver, then the bulb was done with 2 part epoxy. Sometimes I even 'broke' a bulb, and left a wire or two hanging out.
All in all, once I've done my painting/preps, weathering is an easier chore. No gloss ever needed.