Nice work on yours. The burgundy really did age well.
I used mothers polish and finished with turtle wax. I cant take too much credit as even with a wet paper towel the paint started coming out nicely.
I am 6'2" and I've set my lower limit at 59cm, but even then with a longer stem and seatpost. You may be alright with the 22.5cm if you can get a taller stem in the end.