Congratulations Graham
That is a great set - I always like to see a matched set. The clear glass on the 54, a good boot, and looks like really good plastic inserts, they are a good set.
On my set, you can do a little test area if you like, but I lathered them down with soft-scrub with bleach. I let that bleach/gel mixture sit on them for 15 minutes or so -- it really took out alot of the yellow discoloration that had got into the paint. I didn't buff it too hard but the stuff isn't supposed to scratch. Then I gave it a good coat of car polish. I'd take the time to just dab an artist's brush into some white paint if there is a little scratch here and there. You won't even notice when its done. Good luck.
Brian - Northwesty