Because I have the time -- acid etch after grinding for uber clean?

[accelerus]

So I did things the "right" way and rented a dimabrush from home depot -- it worked fairly well (before and after shots below)

Since the weather is pretty crappy here in central TX I have to delay applying my primer and epoxy till I have some for sure good weather.

Before:



After:



The grinding was good -- but not 100% clean, would there be any reason NOT to do the acid wash? Already hosed it down once, but can still feel a fine layer when I run my finger across it.

I got the time since I can't lay epoxy till early next week it seems. -- just wondering if there is a good reason not to?

 

[Garage Flooring]

Is it the dust your feeling? I dont think you are going to accomplish anything with an acid etch. That really is for profile. Perhaps vac and a solvent wipe?

 

[LegacyIndustrial]

Accelerus:
There will always be a little dust after you grind a floor.
If you think it's too much, you can pressure wash and allow to dry a few days.

I am not a big fan of water, but if you have the luxury of time it's fine.
I have yet to prep a floor that looks 100% perfect, there is always some discoloration. Remember only the big man upstairs can trowel a perfect floor!!

 

[accelerus]

yeah I suppose I'll just do a vac and wipe down instead of breaking out the acid.

I did a vac and wipe down on the lip of the garage and it turned out perfect... just trying to keep busy till the good weather arrives to lay down the primer and epoxy and clear.

 

[Wanna Ride]

I washed and rinsed mine several times after I ground it (had a few small high-spots and imperfections to address), and never used the acid. But my floor was pretty clean when I started, and was only a few years old with no stains.

When I was all done, I could swipe my hand over the floor anywhere and not get any dust at all on my finger tips. Kinda' weird actually, because you're so used to a concrete floor as always having a little dust on it.

That was the first time in my life that I painted something and it came out the way it was supposed to. I knew I had to fight my impatience, and it paid off. Painted that floor eight years ago and it still looks awesome.

 

[accelerus]

sweet!

I got off my *** today and did another full sweep out of the garage (still amazed at the level of concrete dust the broom was able to lift)

Then did another wash out of the garage, and it's starting to get like you said: able to run my finger on the concrete and have it come up clean.

 

[Garage Flooring]

sweet!

I got off my *** today and did another full sweep out of the garage (still amazed at the level of concrete dust the broom was able to lift)

then did another wash out of the garage, and it's starting to get like you said: Able to run my finger on the concrete and have it come up clean.

nice work!

 

[toplessHO]

I think the acid will help emulsify the oil thats been there for years in addition to providing more bite

 

[mnavillus]

Leave the acid alone!

Give the floor a wipe down with Acetone/or alcohol, prior to application...Let dry then start your installation that same day!

from your pic above the surface prep looks good!

good luck

 

[an8pilot]

How about grind/polish the concrete instead of coatings?