-I’ve messed up the painting (very common)
-I’ve ruined the painting (less common)
-I’ve made a right pigs ear of the painting
-I’ve ballsed up the painting (rude)
-I’ve cocked up the painting (rude)
-I’ve arsed up the painting (rude)
-I’ve made a right arse of it (rude)
-I’ve knacked the painting (rude)
-I’ve fucked up the painting (rude)



The rude ones are strong and would be used among friends and colleagues in informal ways.