Media blasting with a pressure washer

[velocemitch]

Has anybody any experience with these devices ?

https://sandblastkit.com/products/sandblastkit-1?f...

I'm thinking about it for the more difficult areas of a body shell where getting in with wire brush attachments is tricky. Plus various suspension and loose chassis parts?

I'd probably use Soda rather than sand and I expect it would be a bit messy.

[paintman]

Lots on youtube.

[velocemitch]

paintman said:

Lots on youtube.

There is, it does look quite a practical and economic method. Just incredibly messy to do on your drive.... !

[dr_gn]

Seems like a brilliant way of removing all protective layers from old steel, while simultaneously injecting water deep into every surface defect.

[velocemitch]

dr_gn said:

Seems like a brilliant way of removing all protective layers from old steel, while simultaneously injecting water deep into every surface defect.

True, needs care as to where its used and thorough drying afterwards.

[dr_gn]

velocemitch said:

dr_gn said:

Seems like a brilliant way of removing all protective layers from old steel, while simultaneously injecting water deep into every surface defect.

True, needs care as to where its used and thorough drying afterwards.

Won't the process of drying initiate corrosion in steel and iron, which you'd then presumably seal in with primer, for enjoyment at some point in the not too distant future?

[velocemitch]

dr_gn said:

velocemitch said:

dr_gn said:

Seems like a brilliant way of removing all protective layers from old steel, while simultaneously injecting water deep into every surface defect.

True, needs care as to where its used and thorough drying afterwards.

Won't the process of drying initiate corrosion in steel and iron, which you'd then presumably seal in with primer, for enjoyment at some point in the not too distant future?

Steel isn’t porous.
Rust is mind, so I agree it’s got the potential to go badly.

[peterperkins]

The media (sand etc) has to be fine and kept bone dry (tricky when you are spraying water all around) or it won't get sucked up..
Sounds like you need a pretty beefy pressure washer as well. That 1kw Aldi £50 special might not cut it..

You can get air compressor dry air blasting kits and media which maybe better depending on your exact requirements.
I've built my own blasting cabinets and kit using Guyson guns in the past and a minimum 12cfm/3kw compressor.
The Guyson stuff was rock solid and did hundreds of hours of work on assorted car parts using glass beads or sand.

You have to be pretty careful with not breathing in the silica/dust when air blasting so a sealed cabinet and/or quality respirator is needed.

Wet blasting avoids the silicosis issue..

[dr_gn]

velocemitch said:

dr_gn said:

velocemitch said:

dr_gn said:

Seems like a brilliant way of removing all protective layers from old steel, while simultaneously injecting water deep into every surface defect.

True, needs care as to where its used and thorough drying afterwards.

Won't the process of drying initiate corrosion in steel and iron, which you'd then presumably seal in with primer, for enjoyment at some point in the not too distant future?

Steel isn’t porous.

Steel with pitting corrosion effectively is porous - which is why I mentioned surface defects. And if there's no corrosion, why blast it at all?

[Starfighter]

You can use WD40 to remove the water and provide a short term corrosion protection. Water as a propellant will reduce the effectiveness of the same media in air.