Rust
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===Media blasting rust=== | ===Media blasting rust=== | ||
| − | *Sand is not recommended for media blasting panels. It acts like little hammers, warping panels with by compressive forces (analagous to hail). Use softer media (list examples): 55 grit silica-based media | + | *Sand is not recommended for media blasting panels. It acts like little hammers, warping panels with by compressive forces (analagous to hail). Technically, it can be done, but extreme caution must be used. |
| − | + | *Use softer media (list examples): 55 grit silica-based media, *[http://en.wikipedia.org/wiki/Sugar_sand Sugar sand] is finer and less-damaging than regular sand. | |
*Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it be eliminated? Some thoughts on this are: | *Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it be eliminated? Some thoughts on this are: | ||
**Although sandblasting may appear to have removed all the rust to the naked eye, it hasn't really done so. | **Although sandblasting may appear to have removed all the rust to the naked eye, it hasn't really done so. | ||
**It's caused by water in the air compressor line, as sand will harbor some moisture. Also, compressed air contains moisture. And, sand has salt in it. A moisture trap in the line should solve the problem with the water in the air line. | **It's caused by water in the air compressor line, as sand will harbor some moisture. Also, compressed air contains moisture. And, sand has salt in it. A moisture trap in the line should solve the problem with the water in the air line. | ||
| − | *Many panels have seams, hems, and bends that are inaccessible by blasting, and can hold moisture and rust. | + | *Many panels have seams, hems, and bends that are inaccessible by blasting, and can hold moisture and rust. A spot blaster is recommended. |
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*One option is to use chemical paint stripper, then use a sandblaster to lightly "dust" the remaining rust. | *One option is to use chemical paint stripper, then use a sandblaster to lightly "dust" the remaining rust. | ||
*Media blasting can remove good metal from body panels too. Also, used media can have metal particles left in the media. | *Media blasting can remove good metal from body panels too. Also, used media can have metal particles left in the media. | ||
*Soda blasting can remove light rust, and won't warp panels. | *Soda blasting can remove light rust, and won't warp panels. | ||
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Need more info on the numerous types of media, which ones are recommended for what, cost, availability, etc. | Need more info on the numerous types of media, which ones are recommended for what, cost, availability, etc. | ||
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