The master level mirrors the IMP. The intermediate level is usually found in the proposal and contains all the end-to-. end activities, but at the âmacroâ level. The detailed IMS is usually a rolling wave planned at the week level.
Instructions. 1  Baking soda Baking soda is the best household item you can use to get the accumulated gunk off your old bathtub. 2  Mix two parts of baking soda and one part of hydrogen peroxide in a small glass bowl. 3  Apply this paste on your enameled bathtub or sink and let it set for about 30 minutes.nstructions. 1  Baking soda Baking soda is the best household item you can use to get the accumulated gunk off your old bathtub. 2  Mix two parts of baking soda and one part of hydrogen peroxide in a small glass bowl. 3  Apply this paste on your enameled bathtub or sink and let it set for about 30 minutes.
Removing Porcelain Bathtub Stains. The most common type of bathtub to get rust stains is porcelain. Porcelain is a heavy stone-like or metal material that is very durable. Since they are so sturdy, removing porcelain bathtub stains can be as easy as using abbrasives on the rust.You can try some abrasive powders such as Comet or Ajax and a scouring pad.Just sprinkle some powder on the stain, add a little water and scrub. This will work for small rust stains that are just beginning.ince they are so sturdy, removing porcelain bathtub stains can be as easy as using abbrasives on the rust. You can try some abrasive powders such as Comet or Ajax and a scouring pad. Just sprinkle some powder on the stain, add a little water and scrub.