Recently removed the teak swim step from my boat to strip and refinish. The aluminum posts on the transom were stuck in the brackets on the transom, and pounding with a rubber mallet was the only way to remove the step. I'm going to take some emory cloth to the posts to clean them up. What can I use to clean inside the 5/8" dia. sockets on the brackets that slide over the posts? Also, is there a non-polluting lubricant I can use to keep things unstuck? Many thanks for your help, PW