All the above suggestions, see if you have a local cycling police officer and a quick visit to the local hardware store at lunchtime, you need the longest thinest welding rod they can provide, about 1.5m would be good.
Unfortunatly the only way to carry a welding rod on your bike is sideways, well strapped to the rack, obviously you don't want it hitting any lamp posts you may pass, so it has to have all 1.5m of the length sticking out into the road.
Ensure that you do not pass close to any cars as the welding rod is liable to do a lot of damage to both wings and door panels as it scrapes past. Test it on a wall first to get the full effect
Unfortunatly the only way to carry a welding rod on your bike is sideways, well strapped to the rack, obviously you don't want it hitting any lamp posts you may pass, so it has to have all 1.5m of the length sticking out into the road.
Ensure that you do not pass close to any cars as the welding rod is liable to do a lot of damage to both wings and door panels as it scrapes past. Test it on a wall first to get the full effect