whitewash (someone's) reputation

Translations
отбелить (чью-то) репутацию
The company tried to whitewash the CEO's reputation after the scandal.
Компания пыталась отбелить репутацию генерального директора после скандала.
Definitions
To deliberately present a person or their actions in a more favorable light, often by concealing or downplaying negative aspects, in order to improve or protect their reputation.