My radiator is the honey comb style as well. The radiator shop put the radiator in the vat and tried to eat off all the paint the last owner sprayed all over the core. Paint on radiator core equals low heat transfer.

52 Chevy 3100 5 Window, LS Swap, 4spd Auto, Vintage Air AC / Heat, CPP Power Front Disc Brake Conversion with bearing upgrade, Power Steering Conversion, LED Tail Lights