Anything and all you need is avail at your local hardware store.
I've got a full class made up and ready to go but I won't do any PFM classes ( or articles) until some other thing get resolved. Once it does I can get out of limbo. Limbo is fine for a short while, but now it's getting ridiculous. After all there are other outles for classes and articles. I may need to avail myself of those . . .
But Ann, the stuff I thing you are looking for is what Lance first stated.
Wax, as in Liquid wax, and in "Satin Wax" made by Watco, avail in "clear" and "dark".
If you can't find the Watco, you can get Liquid Floor Wax (it is actual wax, not the "no wax" floor goo). I think Bruce is one maker.
That'l get you the base.
Add any off the shelf Minwax stain you wish and voilla: a tint in a carrier base.
Add rottenstone a bit of rottenstone and you will get that "dusty" look.
Add more rottenstone and you will get that biblicaly aged look.
OK, forget the Wax base and just brush on some Minwax stain with a foam brush. Violla!
OK, forget the Minwax altogether. Take a spray can of Primer and hold it about 2 feet above. Spray and let it mist over the frame. Instant age, dust and tint.
I keep white, black, grey, brown, and my favorite, that "for heavily rusted metal" dark rusty red one.
If you want to bring back up the highlights just put some thinner on a rag and wipe. The primer will come right off all the highspots giving great low-lights.