1950s; earliest use found in Suburbanite Economist (Chicago). Variant or alteration of porcelainize; perhaps partly (in technical uses) after post-classical Latin porcellanaporcelain.
Definition of porcelanize in US English:
porcelanize
verbˈpɔːsɪlənʌɪz
with object= porcelainize.
Origin
1950s; earliest use found in Suburbanite Economist (Chicago). Variant or alteration of porcelainize; perhaps partly (in technical uses) after post-classical Latin porcellana porcelain.