gild the lily

English Thesaurus

1. make unnecessary additions to what is already complete (verb.change)

hypernym	:	add,
definition	:	make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of (verb.change)

2. adorn unnecessarily (something that is already beautiful) (verb.creation)

hypernym	:	adorn, beautify, decorate, embellish, grace, ornament,
definition	:	make more attractive by adding ornament, colour, etc. (verb.creation)