Plated beading wire from the craft stores (cheap) for fuel and brake lines. Solid copper wire with black insulation (ask an electrician nicely, he'll probably give a you a lifetime supply of scraps) for radiator hoses. For heater hoses all I've used is Detail Master (I think) that I bought ages ago (not expensive). Have not done any parking brake cables yet, but I've seen some builds here with them, someone will chime in...