Sand blasting va dremel sanding

facade

stranger12 wrote: »

I still want to know if the comment re grit is real despite the sarcastic comment

"grit" is blasting media, which is aluminium oxide or glass beads. The "grit" refers to the size of the grains, the smaller the grit number, the bigger the grains.

The little baby spot blasting gun I bought from Aldi came with a bag of media, and catches it after use, so you just keep putting it through over and over again.

The people who restore creaky old cars on TV (with very tedious human interest stories and stupidly tight deadlines for added "drama") use bicarbonate of soda to gently blast away the rust and hopefully leave some steel behind.

Here you go-
https://www.machinemart.co.uk/categories/?search=sand%20blaster

stranger12

Thanks for this.



I bought this blasting gun which is ok but doen't have any adjustments and nozzle

https://www.machinemart.co.uk/p/sb3-gritblast-gun/

Re grain, my bad. I know understand. It is same as sanding grit .

I bought 50 kg of paving sand and 1 tub of below grit 60/80

https://www.machinemart.co.uk/p/7-5kg-60-80-grit-aluminium-oxide-powder-2/

It was expensive at £12 for 7Kg and had made no difference to the paving sand.

So why would i spend £40 on 25kg 60 grit when it was the same as the paving sand at £5 a 25kg bag?

Belive it or not, it took 2x25kg paving sand and 1 time the tub above to clean a 6 pot evo caliper!!!!

That must be expensive and time consuming


What paint stripper would you use that is strong?

By active ingrediant what do you mean?

I am thinking of using brake fluid

angrycrow

Funnily enough the paint in brake calipers is formulated to resist brake fluid. In view of this adding brake fluid to the paint stripper is not likely to do anything.

Ear defenders should be an essential item in any mechanics tool kit.

BeenThroughItAll

angrycrow wrote: »

Ear defenders should be an essential item in any mechanics tool kit.

Totally agree with that. They help block out the drivel spouted by people who think they know what they're doing.

Joe_Horner

stranger12 wrote: »

So why would i spend £40 on 25kg 60 grit when it was the same as the paving sand at £5 a 25kg bag?

Because the proper media won't give you (or anyone else in the area) silicosis, which builder's sand will. And, no, a dust mask isn't enough to keep the dangerous stuff out of your lungs.

stranger12

So what do builders do, i supose when they mix it with cement, some of the sand turns into dust and in turn they will inhale it

Joe_Horner

There's a huge difference between mixing it for cement and blasting it at hundreds of miles an hour at a piece of steel, shattering the grains and filling the air with tiny micron sized particles of the stuff.

Really shouldn't take much engineering ability to see that!

Jackmydad

Joe_Horner wrote: »

There's a huge difference between mixing it for cement and blasting it at hundreds of miles an hour at a piece of steel, shattering the grains and filling the air with tiny micron sized particles of the stuff.

Really shouldn't take much engineering ability to see that!

Exactly.
OP read the HSE leaflet I linked to above.

Joe_Horner

Jackmydad wrote: »

Exactly.
OP read the HSE leaflet I linked to above.

Where it all goes wrong is where people think the dust they can see is the dust that matters. It's not, it's the invisibly small particles at bury themselves in your lung tissue.

stranger12

So i have quite a bit of it then 50kg

Is it best to buy the approved market products only? They are very costly

Will read the link thanks