Modern pewter is 100% lead free and will retain its shiny finish with the minimum of care. It should be washed by hand in hot soapy water and dried with a soft cloth. If it has become dull clean with a metal polish prior to washing. For the best results always polish in straight lines never in circles
Old pewter and items with an antique finish should not be polished with abrasive metal polishes (e.g. "Brasso")
Ensure that any repairs to pewter drinking vessels or containers are undertaken with lead-free solder (e.g. not electrical solder).