For just a deep clean up, soak your metal pipe in isopropyl rubbing Liquor. That ought to dislodge any stubborn residue with ease. You can even operate hot h2o from the pipe to help retain matters clean up.virtuemart_product_id,virtuemart_shoppergroup_id,product_price_publish_up,product_price_publish_downIn more modern day metal pipes, you will see