[legion]

No way would my wife ever borrow a tool of mine without some discussion first. She'd use one of three approaches to start the conversation:

1. "I want to do X, how would you do it?"
2. "Do you have an X that I could borrow?"
3. "Could you do X for me?"

If she did paint over a clamp, she'd probably have it cleaned before she told me about it. If she couldn't clean it right away, she would tell me and ask how to clean it up. And honestly, I wouldn't be angry with her if she did because it would be an honest mistake that she's trying to fix.