I just did the same thing on my 72 FJ40. I painted the bumper black back in 74 when I mounted the winch and since then also painted all those other pewter parts black. Now I'm going back to the original color scheme.
I purchased 5 cans of the pewter paint from JT Outfitters and with them did heater parts, glove box cover, dash, bumperettes, door inspection panels and handles, seat frames and a couple of seat backs. The cans worked well, and the color matched the factory color pretty well; I found it a little less bronze/gold than the original paint for my year. The paint quality is good; it applies well and can be polished and waxed to a good sheen. The down side is the durability. It scratches more easily than the factory paint. Consequently, when it came time to paint my front bumper, this lack of durability was a concern so I ordered the hardened paint from CCOT.
I just finished shooting the bumper a few days ago and am pleased with the result. It is a closer match to my original factory color than the JTO spray cans and has a much better sheen though I would expect that given the can vs a spray gun which can be adjusted perfectly for optimal application. I expect the hardened paint (CCOT) to be more durable - time will tell.
So, all this means nothing without pictures so here are some comparisons. The first is my old, newly refinished bumper (bottom) setting below a one year old factory replacement bumper (top). Good match. The second photo is again my refinished bumper below the bumperettes which were painted a year ago with the JTO spray cans and buffed. Again, good match but not perfect, and the CCOT paint has a better/deeper shine and does have the bronze/gold hue of the original paint. All in all, I think both colors are OK since even the original paint has aged and probably isn't the same color as it was 40 years ago.
My recommendation: if you have a compressor and spray gun and have a lot of items to paint - the CCOT half gallon kit is great. If you don't have the tools and/or just have one or two items to paint, the JTO spray cans do a very respectable job but you may have to be more careful with the parts and expect to refinish them down the road.
So, there you have it.