Review on 🎹 Cory Super High Gloss Piano Polish: Revitalize & Protect Your High Gloss Piano Finish! by Mary Hawkins

Used on my high gloss polyester Steinway Hamburg grand piano for almost 30 years. While I have plenty of microfiber towels, for easy dusting I prefer old, well-washed cotton towels. If there are fingerprints, for example from piano equipment, then I use microfiber with Cory spray. Always turn in the same direction on a new side or section of fabric with each pass, never in a circular motion or eddies will form over the years. When this happens, buy a bottle of Maguire "Swirl Remover" which, oddly enough, also gets rid of any slight "dullness" you didn't know you had. You won't notice the mirror enhancement until you use it, the bonus effect. However, I have used Maguire every 5-10 years or so rather than every few weeks with a Cory product. The bottle of Cory I bought first lasted at least 10-15 years. This is the best I've come across to reduce fingerprints when opening and closing the lid and falling board, and reducing dust buildup on a black piano. Definitely avoid feather dusters as they slowly scratch the surface with dust.