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media blasting Q's can you help me?

I want to blast some parts for my car. nothing big or heavy coated like the valve cover coating, that I will chemically remove. but once parts are in bare metal Id like to do more detailing on them.

I have one of those erasers(look like an airbrush) blasting units.

the owners manual call for 270 mesh glass bead abrasive.

after trying to find the 270.. it seems like everyone has a way of grading their media supplies.

some are #3 or # 13 others are in sieves measurements .... I already found out that 270 is around 106+- microns . what I don't know or understand is how can I know which of these # = a 270 mesh.

on egay there is a #13 which is ultra fine but it doesn't say size in microns. is there a table somewhere or a way of knowing which is which ?

I don't have egay account so please don't tell me to contact the seller.

TIA

Update:

I know finer is better for what I need. what I need to know is how fine they are in relationship to one another.

if one company defines fine as something lower than 270 mesh(coarser), it will do no good for me.

I need to know how fine say for example that # 9 or #13 are. basically what mesh# they are.

1 Answer

Relevance
  • 9 years ago
    Favorite Answer

    The finer the better, but it doesn't really matter what grade you use.

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