SPECIAL CASES

Nickel and bimetal (Soviet kopecks)

  • **Bar soap** soak for several days
  • Every day — take it out and brush it with a toothbrush
  • To restore nickel: vinegar + salt
  • **Asidol (rust converter)** — Soviet coins turn whitish, and the copper ones turn pale

Cast items and jewelry

  • Fiberglass brushes work, but you need a gentler touch (use long, frayed fibers)
  • Clean in water, without pressure
  • **⚠️ If it has stones — don't clean it!** They'll all fall out.

Thick layers of oxides

  • Scaler/scraper — remove the thick layer
  • Azelit or citric acid
  • Finish with a fiberglass brush

Cast iron shot/cannonballs

  • 9 V electrolysis or heat + brush
  • Oil for preservation