Sledge hammer? One minute? Here’s where you go:
Step 1: Roof panel. Crease or puncture it. Replacement involves removal I installation of all glass and about 10 hours of labor.
Step 2: Both quarter panels (rear fender) Deliver severe dents on each near the rear bumper, door lock pillar and roof panel. Each quarter panel can cost around $900, replacement of both entails at least 20 hours of labor.
Step 3: Windshield and headlights, other light clusters & glass as time permits.
Step 4: Sharp dents in remaining body panels
Step 5: Smack the dash for all you’re worth.
Step 6: Take a few good whacks in the engine compartment–don’t try to break the motor, your time is best spent damaging a high number of small components. If you’re really brave, break open the battery and splash acid around the engine compartment.
Maybe a whack or two at the wheel hubs–just damage them.
Generally speaking, paint/body work will cost about $40/hr and mechanical is about $80.
If the interior is big enough you might be able to get a good swing at the dash–this is a good thing. Damage the airbags if possible–they run about $1,000 each. As a rule of thumb, you only need to do about $11-$12,000 in damage to toal the car by insurance standards.