I love old AMT kits. Give me four screws 'n two wire axles and I'm happy. But, yeah, the wipers are less than stellar. Solution; I make my own. Recipe: styrene rod shaft, carved ABS arm, styrene strip arm extension and blade, Testors gloss black, Alclad chrome, insert shaft in hole drilled in cowl after carefully shaving off the molded-on wiper-shaped bumps.
Separate wipers included on the chrome tree would be great if they were somewhere near scale and were molded and plated with no flash, but that doesn't seem possible given the examples I've seen. Yeah, I'm looking at you, Revell...
As for door handles, most of what I'm building these days are mild customs so they usually get shaved off, but I have made my own from ABS or styrene, cut them out of another kit body (ie. cut out of AMT '57 Ford then fitted to AMT '58) or robbed them out of a similar kit (Revellogram '59 Impala for AMT '60 Buick, and other '59-'60 GM cars.) Speaking of those handles from the '59 Impala, they do get plated with a little bit of flash present so they need meticulous cleanup and touch up, or stripping and replating which is a bit of a peeve, so I guess it's sort of a trade off.