I have brass handrails purchased from P&D Hobby years ago. Since then I've repainted/decaled a couple of Lionel postwar F units, but did not install the handrails.
If anyone has installed handrails on a Lionel, MTH, etc. cab please tell me how you did it. If you would like to talk me through it rather than type a response, use the email address in my profile and I'll send you my phone number.
Thanks.
Carl