I used to love the Deft spray also but, have not seen it available in this area for a long time.
Now I use either Rustoleum which says it is a crystal clear enamel or Krylon which their web-site says is a clear acrylic.
Both are fast drying. The Krylon says on the can non-yellowing and, although not stated on the can, I have not had any
problems with iRustoleum yellowing either. The last time I bought Rustoleum because they now have a 15 ounce can cheaper than
the 12 ounce can of their own product or the 12 ounce can of Krylon.
There are lots of warnings about health issues like cancer, nerve disorders, birth defects and respiratory problems with
both of these products but, that seems to be normal with practically any of these type products.
God Bless! Spirithorse