The term 'wiping slate' generally implies the erasure of something, and it's antonyms are the opposite of that. Instead of erasing or wiping out, the antonyms focus on preserving, keeping, or adding. Some antonyms for wiping slate include 'building up,' 'adding to' and 'adding onto', 'preserving,' 'maintaining,' and 'conserving.' Alternatively, some might use more colorful terms such as 'enhancing,' 'augmenting,' or 'embellishing.' In many cases, these antonyms can be used to describe a more constructive, positive approach to the situation, which focuses on growth and improvement rather than just erasing everything that came before.