Never ever put clear nail polish on fashion jewelry! two reasons: 1) it will get cloudy and chip quickly, making your jewelry look like heck, and 2) it will act as a solvent and make your settings fall out.
To keep your jewelry from tarnishing, get a good quality polishing cloth and wipe them down occasionally. You can also use a weak solution (5%) of ammonia in water to clean your jewelry.
There is no way to keep costume (I'm assuming that's what you mean by "fashion") jewelry from tarnishing absolutely, but you can help prevent tarnish by keeping the jewelry dry and clean, and out of the air when not being worn. Minor tarnish can be buffed off with a jewelry polishing cloth, but cleaning heavy tarnish may also remove some gold or silver plate from the piece, so go easy. Store clean and dry in a soft cloth containers to avoid scratching the items; store individual pieces separately.
Oldest trick in the book. 2 coats of clear nail polish. Let it dry well between coats.
Ive allways coated it with clear nail polish
To prevent silver jewelry from turning copper, store it in airtight containers to minimize exposure to air and moisture. Avoid contact with perfumes, lotions, and harsh chemicals that can cause tarnishing. Regularly clean your silver jewelry with a soft cloth or a silver polishing cloth to remove any tarnish buildup.
I read in an In-Style magazine to apply a layer of clear finger nail polish to your fake gold and that will prevent IT from turning colors and prevent your FINGER from turning colors too! Hope this helps!!
Apply a thin coat of clear nail polish to keep from fading.
You can place the costume jewelry in jewelry cleaner and buff it out lightly. When the shine does return you can apply clear nail polish to coated metals to keep the colors shiny.
Clear nail polish is a special coat of nail polish to protect the other coat of nail polish
To prevent silver plated items from tarnishing, store them in airtight containers or anti-tarnish cloth bags when not in use. Avoid exposing them to harsh chemicals like bleach or perfumes, and regularly clean them with a soft cloth to remove dirt and oils that can contribute to tarnishing. Additionally, consider applying a thin coat of clear nail polish to create a barrier between the silver and the air.
Clear nail polish is a special coat of nail polish to protect the other coat of nail polish
Fake metals and jewelry often turn brown when exposed to moisture. This can be countered by applying a thin layer of clear nail polish to the item.
You can coat the backs of the jewelry with clear nail polish, that does help somewhat, you still need to limit the time that you wear the jewelry though... Find out what you are allergic to, is it the gold or the nickel, sometimes if its gold you can get 10 K gold instead of higher values and that helps... If its the nickel then you would need to get the nickel free jewelry...