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Clean areas after dustless blasting

#21
Thanks for the explanation! I will scotchbrite as much as I can.
This is the whole question with your post. You said you did not want to wash it, then week or so later were still asking, then claimed you already washed it and epoxied it, now you are saying you will scotch brite it.

There is alot of knowledge here, sometimes you are straight with people and get kicked under the bus, other times you get helpful responses. Just dont know what stage you are really at now.
 
#23
This is the whole question with your post. You said you did not want to wash it, then week or so later were still asking, then claimed you already washed it and epoxied it, now you are saying you will scotch brite it.

There is alot of knowledge here, sometimes you are straight with people and get kicked under the bus, other times you get helpful responses. Just dont know what stage you are really at now.

The exterior of the car was epoxied 2 days after it was blasted. The inside and trunk were not. Surprisingly there was not flash rust on the non coated parts for 3 weeks until I treated a few areas with oshpo and neutralized it last night.
 
#25
I used dustless blasting...
couple things....they should be adding waterborn rust inhibitor to the water tank while blasting. Then after blasting, high pressure water with rust inhibitor this knocks the caked on media off. Then it should sit outside on a sunny day, with heat to dry off, and hit with compressed air. Depending on where your located and humidity, you need to get epoxy on soon. And yes hit with 80 grit first, light hit, dont go crazy.
 

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#26
The exterior of the car was epoxied 2 days after it was blasted. The inside and trunk were not. Surprisingly there was not flash rust on the non coated parts for 3 weeks until I treated a few areas with oshpo and neutralized it last night.
As giggity said, they use a rust inhibitor (Holdtight) that doesn't have to be rinsed off. When I use phosphoric acid on small parts and rinse with hot water, then wipe with a cloth before using compressed air to fully dry, the parts will not flash rust for several days and even weeks depending on where they are stored.

I have a pile of small panels right now that were acid cleaned three weeks ago and have no flash rust, but they have been in the shop at 70 degrees the whole time. The summer humidity will make them flash rust in just a few days. Flash rust is about the water, and how long the parts or panels stay wet. Some people think of Holdtight as just a salt remover, but you can also buy Holdtight to rinse with, although they recommend using it in a pressure washer for best results.
 
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