Surface Prep - Removing Existing 1-part Epoxy

[roosterfish]

Recently put down 1-part epoxy and was having tire pick up issues. I scraped and sanded the problem areas and wanted to wash really well before reapplying some leftover 1-part. When I began washing (with just a garden hose nozzle), I noticed more coating coming up. (I have read all about surface prep threads, so I'm sure my issues are related to that). So, I have decided to remove the 1-part and recoat (product to be determined after reading more threads).

My question is, what is my best option for removal:

1) Rent a high pressure washer and try to remove the entire coat since some of it was coming up with my garden hose.

2) Rent a diamond grinder - but I read on one of the diamond grinding threads that the existing coating will gum up the grinder and make the process long and grueling
However, the EDCO website said the Dyma-serts are "ideal for removing epoxy thin coats"

3) Chemicals (Jasco?) combined with the pressure washer

4) Other suggestions since I am a novice

And advice is greatly appreciated. After all the time and prep I put in on the 1-part epoxy exercise, the wife wants this round to be the last one ...

 

[A_Pmech]

They guys I talked with about 8 years ago did airplane hangars. For bad epoxy jobs, dried composites resin and gunk etc. they used a deck scaler, aka "roto-peener".

http://www.tfiinc.com/atp/rust_removal.htm

http://www.gatorx.com/Deck_scaler.html

After scaling, they come back and use the grinder to smooth the floor back before re-coating.

Do the scaling and grinding wet.

 

[ktm450]

If it's already coming up with a garden hose, I'd try a good pressure washer first. probably the easiest and cheapest route to get most/all the old stuff up. Then you can decide how to prep for whatever you do next.

 

[Moto]

One-part epoxy?

I thought epoxy was always two-part.

 

[roosterfish]

One-part epoxy?

I thought epoxy was always two-part.

I'm no expert, but I believe that you are correct. I read in another thread that a "1-part epoxy" is not truly an epoxy and should not be marketed as such.

 

[SC-Eric]

This was probably an Acrylic Epoxy like the 'Get Rich Quick Scheme' guy was pushing... A very small amount of epoxy is added to cheap acrylic to increase it's adhesion and durability. These types of products are stronger than standard acrylic but much weaker than nanopolymer acrylics (like our AcryliSeal 3501). Even our AcryliSeal 3501 isn't going to match a good 100% solids 2K epoxy.

Oh... you can also have 1K Epoxy esters or even 1K epoxies that need to be baked... they contain a latent curing agent that will not react until they reach a certain temperature.