一般花岗岩地板(Granite)怎么处理？

三个装修商的价格好像差别太大：
1. Wax work for granite flooring at living, dining and passageway S$280
2. Provide Labour to wax granite flooring at living and dining S$600
3. Supply labour & material to re-polish Granite floor at Living room S$ 800
三个装修商都是华新的朋友们推荐的， 有点伤脑筋啊！ 求行家指点