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Eastwood After Blast Metal Prep is rated 4.5 out of 5 by 31.
Rated 5 out of 5 by from Remove and prevent flash rusting! I bought After Blast as it was advertised to clean and stop flash rusting after media blasting, grinding and stripping. I was stripping my 73 Challenger and was having problems with flash rust, especially in the high humidity Houston area. To my surprise, this product cleaned the metal extremely well. Alll the rust, even in small scratches, was removed. I've been using a cleaning disk to remove paint and Bondo, and the swirls in the metal left by the disks seem to be removed by After Blast. The metal actually LOOKS really clean, too! I was a little concerned that one jug of After Blast wasn't going to be enough for my entire car, but I was pleasantly surprised at how far just a little went. I can now use that extra bottle I bought to clean small parts before refinishing as well! Overall, exceeded my expectations and I actually glad I bought this product, and I think you will be too!
Date published: 2010-06-25
Rated 5 out of 5 by from Great Product! "But Please Read" I have a 71 Camaro that I am restoring sandblasted the car, there are some spots that had the factory e-coat (Factory Primer) still on the car. this was due to it was in great shape. When I used the After Blast on the bare metal it worked Awesome!!! it cleaned and etched the bare metal perfectly! But when the after blast got on the primer it leaves a residue Just be sure to clean it off and scuff the primer. I cleaned it off with prep all (a wax and grease remover) then wiped down the entire surface including the bare metal again with the prep all again using the blue shop towles wiping each wipe with a clean side of the shop towel. I used ppg epoxy primer and followeed it with Eastwoods chassie black paint. I am very happy with the results and happy with the Eastwood products!!!
Date published: 2015-03-10
Rated 3 out of 5 by from After blast I bought the product for prepping the steel for powder coating. I manufacture a motorcycle rack to transport you dirt bike, sport bike and Harley. I built my on oven. I also bought a dual voltage gun from you, very unhappy with the gun, working with Sean to replace it. When I received the product it leaked in the plastic bag and I could not read the instructions so I called and the customer service person had to read the instruction I guess because he put me on hold. I still not sure do you spray and wipe it off or let it try.? I'm pretty sure you don't use any water. Any clarification would help Thanks Richard
Date published: 2015-01-10
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The instructions indicate that AB should not be used on galvanized steel.  Some of the blasted panels were galvanized (e.g. rocker panels).  Is there a negative effect (other than loss of some of the zinc) if AB contacted these surfaces and was wiped off?

Asked by: Marc E
The reaction between the acid in the After blast, Fast etch, or rust dissolver would react with the galvanized coating and great an extremely toxic gas.
Answered by: Scott C
Date published: 2017-11-17

Can you use after soaking brake calipers / spindles in Metal Rescue rust bath?

Asked by: mopey69
This would be a great way to keep the parts from flash rusting after removing all the rust.
Answered by: S Church
Date published: 2017-11-30

Can I use Eastwood epoxy primer on top of this (seems your self-etch primer is ok based on earlier comments), and if so, do I need to do anything special beforehand, other than a clean wipedown with something like isopropyl alcohol?

Asked by: jkj2000
Yes, the Epoxy can be applied over this product. It would be recommended to wipe down the surface with PRE before applying directly over.
Answered by: KHoffnagle
Date published: 2017-11-30

Can I use etch primer over after blast? 

Asked by: Robbie dee
You can certainly use a Self etch primer after using AfterBlast.
Answered by: S Church
Date published: 2017-11-30

Can I bondo over after blast

Asked by: Robbie dee
You can certainly apply filler over an area cleaned with Afterblast.
Answered by: S Church
Date published: 2017-11-30

Is After Blast weldable?

Asked by: ruckUS13
You would want to clean the area off with a wax and grease remover before welding where the After Blast has been placed.
Answered by: S Church
Date published: 2017-11-30

Is this rated for MILC10578

Asked by: Charlie1212
Our Afterblast is not designed to meet MILC10578 but does appear to already fall into it partially since it is a phosphoric acid solution that will etch metal and provide an excellent surface for paint adhesion. Except ours is already suspended in a solution and does not need to be diluted.
Answered by: S Church
Date published: 2017-11-30

I have tinned some areas for body solder and was unable to apply the solder at that time, treated the area with after blast do I need to clean the area before soldering Thanks

Asked by: 1958 jag
You will need to re tin the area to make for good adhesion.
Answered by: S Church
Date published: 2017-11-30
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Eastwood After Blast Metal Prep

Item #11971ZP Brand: Eastwood

Cleans, degreases, etches blasted metal to improve paint adhesion

Out of stock

Only $39.99

Sale $29.97


Use "After Blast" after blasting or sanding metal, then paint, prime or powder-coat.

  • Spray, wipe and repeat until clean
  • Aqueous cleaners and phosphoric acid clean and etch the metal
  • Zinc phosphate coating improves paint, primer or powder adhesion
  • Also protects against flash corrosion

After Blast cleans, degreases and etches just-blasted or newly-sanded metal to improve adhesion for painting, priming or powder-coating.

More info...

About Eastwood After Blast Metal Prep

After Blast is designed to clean, degrease and etch freshly blasted or sanded metal prior to painting or powder coating. Use with a plastic spray bottle to liberally apply to the part, wipe and reapply until all contaminants are removed. The blend of aqueous cleaners and phosphoric acid properly cleans, etches the metal and leaves a zinc phosphate coating that is excellent for paint, primer or powder adhesion. Also protects the metal from flash corrosion for extended periods. Use on all your fresh cast iron, steel or aluminum components.


1 gallon


Use after abrasive, soda blasting or sanding/grinding operations to assure of a clean paint ready metal surface.


Use in well ventilated area and wear rubber gloves


made in USA 1 year shelf life


Use on cast iron steel and aluminum to clean and properly etch the metal for coatings. The phosphoric acid will etch the metal and provide an excellent surface etch for paint adhesion. Use on frames, sheet metal engine blocks and suspension components after blasting. Do not apply to painted surfaces, chrome, plastic or glass.

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