These have to be one of the hardest thing to duplicate since the plating on these hoses was crappy and the yellow looked very pail and dull in some cases.

To prep these to plate.
1. Clean the inside of the hose with hot soapy water .
2. Plug the ends of the pipe ends with plastic plugs.
3. Tape the hose rubber hose near the crimped ends to protect them.
4. Glass bead the hose ends.
5. Bend hose into a U shape so the crimp ends are level and wirer together.
6. Bring to you plater and ask him only to dip the ends.
7. Normally the plating is too good. You can dull it with 00000 steel wool.

That is how I do them.