If the concrete does discolor, pressure washing and certain cleaning chemicals will remove most stains.I like Jack Bobeck comment about a 7-day right to cure.

I realize that many gurus and investors promote their use, but I'm staunchly against doing anything that can do harm to your business or to the industry in general.I realize it may sound harsh, but these tactics are what give investors a bad name.

Harsh truth: The only legal way is if you own the properties, meaning buy it, then re sell it, or if you hold an RE license and connect sellers and buyers or you already have a strong buyer list that understands you are a wholesaler and funds your entire transaction.It is illegal without an RE license to wholesale properties otherwise, no matter what you hear, not impossible, but illegal.

I currently own and manage 3 rental properties that are bringing me about 1000/month for all 3 rentals along with having a full-time job in our local chemical plant.

Do it right by using a scoring tool, then strip the paper (chemically is easiest, depending on your sensitivities) and make sure that you neutralize the stripper according to the directions on the chemical.  

Maybe that last statement was a bit harsh but that's the way I see it.

Sounds harsh, but that’s the reality.The formula has always been the same: study hard, go to a good/top school, work hard, save money, invest, educate yourself, network/learn, be kind to people, rinse and repeat.

If you get judged harshly (ie crappy car, etc) then you may not get that opportunity. 

I was able to get them out of a 4 unit property by properly treating all the units which chemicals.

It has has been repaired using "compaction chemical grouting method" which is the normal method of repair for these type problems at least from what I find researching it.