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Ready for Wet Sand Blasting

cobbadog

Registered
Weather permitting, tomorrow is the day for doing the wet sand blasting. Of course today has had light showers and hopefully not tomorrow. So all of this makes a tractor again, one day.

Damn pic, I corrected it before posting and now its laying down again.
 

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Harry

Administrator
Staff member
If you are using an Apple iPhone, they embed the camera position into the photo data. I cropped and pushed this one as best I could. Photo sizes should be at least 1024 X 1024 and ImageMagick makes the thumbnails. I have upped those to 200 X 200.
 

Scotty 2

Registered
Hello Cobba
If that was me doing the blasting, it would mean rain for sure.
Is there a reason for wet blasting over dry?

Cheers then
Scott
 

RustyNumbat

Registered
"Can't wet sandblast because it's raining and everything is wet" :bonk:

I always figured doing it outdoors when there's a bit of wind and wearing a mask, combined with the fact I sandblast less than once a month, means it's fine to not do everything to industrial OHS spec.
 

cobbadog

Registered
Thank you Harry for correcting my pic. No iPhone in my hands only Android and I thought and usually do compress the images before posting but the one of the chassis was misbehaving badly when I was compressing it and I went to a bigger compress than normal to get it to post. This happens to me on very rare occasions so it is no big issue for me. Thanks again.

Well the call was made early this morning, too wet'. Sounds Irish but it is not the fact that the items get wet rather it's the process that happens once blasted it is coated with a solution, possibly hyperchloric acid to slow down the surface rust forming before I can get the primer on. So now it wont be for another 2 weeks due to a long weekend next weekend and it's not her birthday is it? (HRH Lizzy).

The 'wet' system keeps the dust down and as mentioned it can then be blended with a rust preventative to keep the surface surface rust free for a couple of days at least until it can be sprayed in primer.
 

cobbadog

Registered
AS I planned to be spray painting instead of working today I found something to amuse me for an hour. This grille badge had some red paint and some blue paint, yep, blue on it so I set about cleaning and polishing.
My thoughts are that this tractor possibly spent some time in either the Navy or Air Force in it's earlier life. Yes, I do know that the war was over when this was made but our forces still bought and used the same equipment after the wars.

Again the image fell over, bugga! but you get the idea.
 

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cobbadog

Registered
I bought a new set of bonnet clips. I only had 3 of the originals and they were a bit rough and ordinary on a good day. Listed them for sale and they went in no time flat which in turn partly paid for the new ones. The new ones had a bad paint job so I rubbed them all back and re painted them.
 

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Tracy T

Subscriber
Last Subscription Date
07/16/2019
huh, never herd of wet blasting! do you still need protective clothing due to the material bouncing back? just from watching the video i would almost bet it does not make as much of a mess and probably does a better job using 3000 lbs of pressure!
 

DustyBar

Subscriber
Last Subscription Date
01/14/2020
I first encountered wet blasting in a shipyard back in 1985. Thats a few years ago already. They used automated equipment to follow a ships contoured hull, 10k psi with sand added. The hull would come out white metal. Not sure what they added for rust protection before applying fresh bottom paint.
 

lanzalldog

Registered
Yep, you need a raincoat and good eye protection.Hardest part is keeping dry sand up to the unit that is clean and not getting the sand wet as the suction line is not that long. Good job on a summers day.
 

Steve Kunz

Subscriber
Last Subscription Date
06/23/2020
I guess there is no reusing the sand. When I sandblast I put some plastic tarps down to catch some of the sand, then run it through a screen to reuse it.
 

oldgoat

Email NOT Working
Next door neighbour has a wet sandblasting unit but only uses a 100 psi compressor and the sand is held in a watery suspension in a separate pressure vessel. Seems to do a good job and he also adds inhibitor so you can get a coat of primer on before it rusts.
 

Scotty 2

Registered
Hello Cobba
Is it all systems go for this week-end old mate?
I'd come down and give a hand, but it's not really worth the trip unless Dee makes some scones.

Cheers Scott
 

cobbadog

Registered
Yes Scotty, tomorrow is the day. All confirmed, weather permitting, and an 8.30am kick off which gives me time for our regular Sunday morning 'home made' pancakes with sultanas and fresh orange juice from the tree out back. That's as close to scones in this house anymore, no more cakes either so the you beaut big fancy mixer just sits on the bench top now, (I don't like diabetes).
So today we went up the road to another paint shop to get the 2pac top coat paint because the local shop is closing down and now has very little stock. About 2 weeks ago I rang this new supplier up and asked about Hunting Pink and he no longer had the formula for it. However since my phone cal and this morning the owner rang his paint supplier and got them on the job. They eventually found the colour in the acrylic range and then re made the formula for 2pac. The paint shop man, Volka, offered to make a very small sample to show me and WOW what a ripper so he made the 4ltrs up and with 2ltrs of catalyst makes it 6ltrs plus your thinners of about 10-15% so might be enough to do the job. Bought another 4ltrs of super etch primer and paid him up but then he started throwing all sorts of stuff at me like a proper mixing jug with all the correct ratios on the side and a pouring spout that clips onto the 4ltr cans which I already had one and they work real treat as you can put a cap on the spout to keep the air out while your still spraying but not good enough to seal the can once finished.
So now I probably wont get much sleep tonight in anticipation of some progress at last. I will take some pics of the blasting and put them up tomorrow.
 

sunshineman

Registered
Hi many automotive engine reconditioners had wet sandblast cabinets , aluminium came out with nice shine . The big advantage is no cleaning grease and the like prior to blasting.Dry blasting in cabinents required parts to be free from oil, grease, and moisture
Regards sunshineman
 

Tony Rye

Registered
Last Subscription Date
08/24/2018
back when I did blasting wet are dry we would let the blasted metal layout to it started too just start to change colors than paint. a couple of days most time. Paint would stick better
 

cobbadog

Registered
All went well today with the blasting. Took some pics and out the tractor skid in primer. Tomorrow will do all the other bits.
I will post some pics tomorrow and tell you more about the machine, it was a great set up. For I have to run off to the kennel as this little puppy is stuffed.
 

cobbadog

Registered
Here is a back end shot of the blaster. A big Atlas Copco compressor and the green hopper is where the grit and water are mixed. There is a vibrator at the bottom of the hopper to keep the grit in suspension and the air drives the lot through a 3" diameter hose. There is a 1000ltr water tank at the front of the trailer and a petrol driven gernie for washing off.
Now almost everything is in etch primer except the fuel tank, it has pin holes and I am soldering them up so it can be in primer soon. The anti-rust inhibitor he uses in the water certainly works well on sheet metal but not on cast iron, that started to get surface rust withing hours. But even now at the end of the second day the fuel tank is still perfectly clean.
 

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