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 posts. The original method used on cast iron baths is 'vitreous enamel'- this can still be done but is quite pricey. There are various other methods of resurfacing a bath from a 'one-coat system' which takes about an hour to a two week process.You get what you pay for. But dont smash it up!! posts. The original method used on cast iron baths is 'vitreous enamel'- this can still be done but is quite pricey. There are various other methods of resurfacing a bath from a 'one-coat system' which takes about an hour to a two week process. You get what you pay for.