Nouns ending in -ure are usually feminine.
The suffix often marks a result, state, or collective.
Is peinture masculine or feminine?
lapeinture
The rule behind it
94.3% of -ure nouns are feminine
In context
As-tu un passe-temps... comme la peinture par exemple ?
Do you have a hobby - for example, painting?
Il est assez riche pour acheter la peinture.
He is rich enough to buy the painting.
Tom a du talent pour la peinture moderne.
Tom has a talent for modern painting.