Many folks here and on the slot board use the Easy Off oven cleaner in the blue spray can. Put the object in a baggy, spray it, and seal it.
I have used automotive degreaser liquid to strip paint off of plastic model cars with no problems, it just takes a day or two depending on how thick the coating is.
try just plain old, cheap ammonia.
I have been building models for decades, and thats all I use when I want to strip off chrome plating.
styrene or resin, it works quick.
best advice, test compatibility on a sprue tree first.
I go to the auto parts store and get a jug of concentrated purple cleaner / degreaser. Pour some in an old tupperware container with the part and let it soak for a couple of days. It removes the chrome and the clear carrier under the chrome as well.