My cookie cutters are rusted; can I clean them?

A. Several companies make pearlescent pigments that use the principle of thin-film reflectance. It is possible to reproduce that on a metal substrate, but I think it would be vastly cheaper to use the existing pigments themselves in a clear lacquer or urethane base. You can get different effects by using different particle sizes and concentrations. The companies are Englehard and EM Industries. Englehard also makes iridescent plastic films, which can be converted to glitter and used like the mica's (try Meadowbrook or Glitterex) and it may be possible to simply adhere their film to your products.

Good luck,

A. Moiré metalique for tin:

1.heat your objects to 250 °C

2.immerse it into special pickle:

• 2 parts hydrochloric acid
  
• 1 part nitric acid
  
• 3 parts water
  
• 1/4 part potassium bichromate

3.between crystals you must obtain black colour

4.rinse well

5.immerse to hydrochloric acid

6.without rinsing immerse in: 10 parts sodium thiosulphate [on eBay or Amazon] /120 parts water solution- after that rinse it and lacquer it!

A. If they are special to you, Edda, a plating shop can re-tin them for you. But due to the relatively low labor cost of making thousands of new cookie cutters at a time, and the high labor cost of replating a few on a onesy-twosy basis, replating your old ones will cost more than buying new. They are not dangerous (unless you cut yourself deeply with one), but they might stain the cookies I suppose.

A. Clean them with a scotchbrite pad [on eBay or Amazon] and a suspension of baking soda [on eBay or Amazon] and water. Lightly oil after cleaning and after each use.

A. Hi Lisa. Most paints are not designed to be used as food contact surfaces. Rustoleum is not a type of paint but a brand name of lots of different types of paint, so it's probably inaccurate to say that it is or isn't food-safe.

I would suggest you use the search term "food-safe paint" or "food contact paint" or "food grade paint" and you will see very specific suggestions both from the companies that offer them and from regulatory authorities. Good luck!

Regards,