What do you do to clean your fresh blasted surfaces ?

F

fastwayfirebird400

After you blast a body shell do you then clean the profiled surface with a waterborne/wax grease remover product or do you hit with 80 grit on a DA first? It seems that the fresh blasted surface with be a great tooth for the epoxy to adhere to. The problem I have is finding a good way to wipe a fresh blasted surface down without leaving lint or other remains of paper towels or what I just used to dry it with. Whats your procedure ?
 
I blow off any heavy dust from blasting, buzz with 80 and then thoroughly clean with water based cleaner(barry's cleaner). I then blow off to make sure there's no remaining cleaner after wiping off, and no lint from wiping. I then procede with my epoxy.
 
There is an older post by Bob Hollinshead that would answer your question perfectly. Try searching for bare metal prep. It is highly recommended reading!
 
On blasted surfaces do your normal cleaning then run over it with a red scotchbrite in one hand and an airgun in the other to dislodge and blow any lint away before applying the primer.
 
How long can you leave the metal bare for? Should I do my car in sections to make sure I have time to blast, clean, and then prime?
 
It all depends on your environment, years in a perfect environment. Humidity and contaminant levels need to be considered.
 
Thanks for the reply! Loving this site!! I'm going to be putting a list together of what I am looking to do and see if SPI can supply it!
 
I assume uncontrolled environments when making recommendations, and say to only strip what you can prime within several days of exposing the metal. For a hobbyist, that might mean whatever can be done in a weekend, 1-3 panels maybe.
 
In the same boat with the same questions here.. Will I be on with just using a solvent based wax and grease remover before the SPI Epoxy? Or should I order the waterborne W&G remover?
I am using BlackDiamond media.
 
I see water-based #700 as the best for bare metal, unless there is visible grease on the surface, then use #710 on those areas first.
 
Everywhere that has waterborne cleaners is closed today and yesterday. I did pick up some "Klean Strip Prep-All" at painters supply Friday but they did not have the waterbased. I want the spray the expoy ASAP because my metal is bare and showing slight coloring from being bare metal for a few days.
Can I use this stuff and spay today?
It is 75F here today and is going to be cooler with some rain the remainder of the week.
 
SPI 700 is what I've always been advised by SPI to use on bare metal prior to SPI epoxy, so it's all I will use. If this step goes wrong, your entire job will be built on a poor foundation.
 
the cleaner will work ok . just use it like any other solvent base cleaner. wipe it on dry it off. do not leave it to dry .
 
Just did this the other day after posting about it. My concern was mainly regarding if I had to do any post prep because of the media(some need neutralized and whatnot) since it was my first time using glass(worked effing awesome by the way). Answer was no need to worry about neutralizing anything so as soon as we got all the dust off and vacuuming done the epoxy went on. No w&g remover.. the way I saw it the surface finish was perfect, clean air supply, not recycling media, didn't get greasy hands on it, what wax and grease am I removing?
3 coats of epoxy and not a single fish eye..
 
Hmm. I run my blaster on the same high flow filter that the gun goes on. Never had a problem? Only thing extra the gun gets is one of those little crap traps
 
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