We're re-doing our bathroom. Have a surround tub (3 walls, 1 ceiling). Had wooden trim, not pretty. Have to somehow finish 3 raw edges from sheetrock. Sheetrock edges are 5/8". Right raw edge is 6'3". Top is width of a normal tub (don't have # with me). Left side butts a window, so forget about this part. Walls just re-painted, stopped, for now, just before the edges. On the blue tub (soon to be reglossed to white) there are some screws that used to be cover by the old wooden trim. Could I use rounding tile around edge? I'm a handy housewife, so please don't use tools or items an average non-carpenter wouldn't know. Any help greatly appreciated!