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.
1 Enamel.This is common in older tubs and is very sensitive to drain cleaner and bleach. 2  Brown, rust-like stains instantly appear when the tub is exposed to bleach or a strong acid. 3  Acrylic. Enamel.This is common in older tubs and is very sensitive to drain cleaner and bleach. 2  Brown, rust-like stains instantly appear when the tub is exposed to bleach or a strong acid. 3  Acrylic.