I never had any luck buying the so-called "matching paint" for either Monocote or Ultracote. They just don't match! I mention this to other flyers and get the same response. Take a sample ironed onto balsa and get a custom mix. A few dollars more but woth it. I bought two cans of Hangar 9 Cub yellow and neither matched the Ultracote. I called Horizon and complained, so they sent me two new cans(spray) and those didn't match either, even when using their primer. So do yourself a big favor and get the local paint store to mix up a can.
cheers