hey, i've just got a sandblaster and cabinet and have been sandblasting all the small parts.
My Question is, after you've sandblastered a part, do you have to go over it with some sandpaper before you prime it or is it fine.

Cheers
Sav

No sandpaper. The finish is great for paint to grab onto. You do need to clean the part though as the aggregate you use can be partially embedded into the part. I have seen aluminum parts rust like iron after being shot blasted.

Iron parts use a course aggregate
Aluminum use something fine or you can eat the surface down and loose gasket face flatness.

Your going to have fun!!! I have one and part come up like new and when painted it sticks like the proverbial!

If your going to get any parts plated use4 a very fine agregate and only get the metal covering removed as you are going to have to buff and polish all the pits out after blasting. Most platers recommend chemical cleaning not blasting.

hey thanks for the info, do i need to go over the metal with wax & gease remover.

Cheers
Sav

I do. You dont want fish eyes appearing on your nicely cleaned and painted parts.

Matt

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thats true

cheers

i dont have a sandblaster or anything but curious, do you have to sandblast in a cabinet as in the manufactured ones?

hey Meehal, i don't think so, my dad has a sandblaster in the same setup as a spray gun with the bottle and he doesn't use a cabinet

Cheers
Sav

The cabinets can be bought as a flat pack from Ebay for as little as 150 for a decent workshop one, I bought one of these and blasted till the cows came home.

You can do it outside, but it makes it hard to retain the garnet for a multiple passes through the gun.

I figure you can sell the cabinet after it's use is gone as well.

If you blast you parts when they have grease on them, then the grease will be recycled through the sand and cause grease smears to affect the paint if you don't wash them in grease remover.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

hey good thinking Mick.

Cheers

I picked up an old oil heater Oil tank and built mine from there. I can fit big pieces in and still move them around.

I then bought a blaster attachment for the high pressure cleaner.

Why I still have parts that are rusting only shows how slack I am!