Hi Peter and Stan,
How would you recommend cleaning porcelain? Especially plates with overglaze enamel?
Thank you
Bokaba
https://www.chinese-antique-porcelain.com/porcelain-care.html
Be especially careful if there is a possibility of cracks or repaired porcelain. Use a tooth brush if necessary. Avoid chemicals, bleaching agents or strong detergents.
If it is plates, I would hand wash them in hot soapy water, I place a towel in the sink for added caution not to bang them against the sink, I do the same with my vases, I use a dish soap dawn seems to work just fine.