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.
*WARNING: Bleach can damage colored porcelain surfaces, so use with caution if you choose to use it. 1. Clean your sink/tub with a mild soap and warm water, allow to dry completely. 2. Attack with your least abrasive cleaners possible (a combination of baking soda and ammonia) to cut grease and help with surface stains. 3. Taking it to the next level, any of the combinations below will help you tackle tougher stains.