DIY Concrete Sanding / Prep

[47ford - 1.5ton]

Guys,

Will have the 'opportunity' in the near future to do my shop floor.

The existing floor has some type of paint (not epoxy) which is chipped all over the place and needs to come off.

I have an old 7" grinder that can meet the trashcan without any tears from me....

I'm thinking of just going and buying 1 7" double row diamond cup grinding wheel and tackling the project...... WET

I have a floor drain so I think the 'mess' created would be a bit easier to clean since I can simply the sludge down the drain.

My shop dimensions are 24x28..... thoughts?

Will either be going Rust Pro (solvent based) or U-Coat-It.... which is in my budget and meets the needs... (Epoxy-Coat etc is just out of reach for me)

Reasoning for thought....

Even with the EDCO rental you have to get into the small tight areas and corners (I have a few by design) and requires a small grinder....

No timeline to return tools
I have a floor drain so wet sanding takes alot of the health risk away from both (vs. dry sanding)

Thoughts?
(FYI 7" double row Diamond Cup is $60 right now at Menards where I live)

 

[47ford - 1.5ton]

CAN DELETE THIS POST...


Finally found a local outfit renting EDCO's with the dyna serts for reasonable cost... (IE Less then $100 / 4 hr)

Screw amatuer weekend when you can do it in a few hours with pro equip

 

[Falcon67]

What you said. I hit some high spots with my 4" grinder and a flap wheel - doing all 960 sq/ft would be prison time.

 

[LegacyIndustrial]

47Ford.
Wet or dry you are going to make a mess with that 7" . Make sure you at least pick-up a ground fault interrupter so you don't become a statistic when the water hits the motor.

Also, if your concrete is the least bit soft you will likely create some major grinding marks that U-Coat will not hide.

 

[Edger]

To grind wet you need very low speed with a 7" grinder say 500rpm to 1500 rpm. A 9" grinder runs at 6500 rpm and a 7" grinder runs at 8,000rpm. Those grinders will immediately throw the water away from the wheel and create dust just the same as if there was no water. Glad you got a rental, electrocution could be a problem.