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Thank you for the instructable. While there may be (some) better ways to do some of the tasks as I have seen in other comments they are off topic. I feel that the topic is on uses and life hacks for steel wool. Yes Steel wool is quite versatile. Many of the comments do mention some valid points like rust marks and galvanic reaction. So use with caution. I have successfully used Stainless steel wool (course pot scourers) to block potential mouse holes. It also makes a versatile backfill when patching holes around pipes before using filler. -Watch out for rust marks if you are not using stainless steel.