Hi Stangace 20,
I hope i can be of some help with your Gold Glow paint problem.
As you may or may not know, i own a '73 Gold Glow Metallic (Paint Code 6F) Convertible here in Australia,and I am a pro auto spraypainter with 36 years background in the trade.
To start with, what the other forum members have said already holds true.
You said in your post (and i hope i'm correct here) that you have identified your Mustang as being a Gold Glow Origiinal '6F' coded vehicle, (look at your door sticker or Marti Report) and you still have some of the 'ORIGINAL' mono enamel paint in good condition still on the car, and your painter has gone to the trouble of carefully color matching by eye to this original color on your car. (by the way,a little trivia, we spell the word color, colour here in Australia)
Given the fact that this original paint would have faded to some degree over the years (depending on how much your car was left out in the sun over the years and exposed to UV rays from the sun), a good color eye mach to the original paint on your car, will be your best way of getting your Gold Glow color that you are chasing.If you have not got any original paint left on your car to go by,try your best to find another Gold Glow owner with original paint still on their Mustang within reasonable travel distance to you, and see if they can be of help.
I am going through this similar process myself at the moment. I want to respray my Mustang even though it still has 90% of the original
Gold Glow paint still on the car and is in very good condition.(I do have my reasons to justify doing this). After spending a lot of time and doing a lot of reserch, that was the way i went in the end myself.
I ended up eye matching to the original color on the car, got a very close match, and was happy with that end result,(spent around 20 hours in total eye matching the color until i was happy with it) and here's why.............
Any photos you see on the net or in real life, vary, and wont be accurate as they should for many reasons, computers and moniters vary,and are not accutate in their own right as well, when our cars were made, large paint batches 'color varied' slightly over the manufacturing process,fading over the years is another issue,cutting and polishing the original Mono Metallic paint finish over the years takes it's toll on affecting the color as well, and even thought in America and Australia i believe a customer can still buy Gold Glow Basecoat over the counter that has been made up to an 'official proper formula', i question how accurate these colors are to the original paint on the '71-'73 Mustangs.(My feedback is some folks yes, some folks no).The color chips you see online or anywhere are old, faded, done in inks, vary, and are not accurate. And lastly, Spectro matching cameras are accurate to a degree, but my experience is that a painter will still have to eye match and 'throw' the color to 'close match' what color you wanted to match to in the first place, after using the camera. All that i have said so far would also ring true to all '71 -'73 Mustang colors as well.
In the end,when all is said and done, i believe eye color matching from the original mono enamel paint that is on a vehicle in good condition, is anyone's best way of achieving the most accurate color for the Mustangs.
If there are any pro painters as forum members, they might like to throw in their opinions or ideas as well as mine. (even criticise mine maybe).
Anyway, hope all that was of some help to you in achieving your quest for the real Gold Glow Color. Give me a yell if you have any other questions for me.
Regards, Austin