Paint over
Definition 1 of 2
Pro Tip 1/3Renovation Context
Used when discussing updating or changing the appearance of a space. 
They planned to paint over the bedroom walls to refresh the look.
Pro Tip 2/3Quick Fix
Implies an easy and fast solution to improve or hide wear and tear. 
Instead of buying a new bike, I'll just paint over the scratches.
Pro Tip 3/3Implied Impermanence
The new paint might not last forever or may reveal the old layer over time. 
When I painted over the stain, I knew it might show through again.