Well like stated above a smooth trowel finish is trouble if your tracking snow in. A broom surface will hold dirt too but you will not slip and slide around.

In your case I would look at using some easy off oven cleaner first. It is a caustic so it will whiten your concrete too when applied. It will lift any oil as well being a caustic with high PH. Acid will etch the cement but can have a sulphide smell linger because of the concrete being the opposite PH.

There was a great product that Diversey Lever called diver foam. It was a liquid oven cleaner extra strength that cleaned cement like new. Oils greases dirt you name it..... it lifted it. It whitened the cement too.

I would try mopping with bleach first but it is an acid too.

Cheers Don.

[Linked Image from corvettejunkie.com]
http://www.pondboss.com/subscribe.asp?c=4


7/8th of an acre, Perch only pond, Ontario, Canada.