Rust
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*Body shop owners argue that professional body shops don't use POR-15 or similar rust "encapsulators" because they would have to re-do too much of their work. They also note that rust prevention products are primarily advertised in hobbyist mags, not in periodicals read by professionals in the paint and body industry. Furthermore, the lack of rust preventive products in non-hobbyist industries does appear suspect. For example, why don't ships at sea use POR-15? | *Body shop owners argue that professional body shops don't use POR-15 or similar rust "encapsulators" because they would have to re-do too much of their work. They also note that rust prevention products are primarily advertised in hobbyist mags, not in periodicals read by professionals in the paint and body industry. Furthermore, the lack of rust preventive products in non-hobbyist industries does appear suspect. For example, why don't ships at sea use POR-15? | ||
*Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it never come back? Some thoughts on this are: | *Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it never come back? Some thoughts on this are: | ||
| − | **It's caused by water in the air compressor line, as sand will harbor some moisture. | + | **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. | ||
**Even high grade epoxies and finishes are not 100% impermeable to water and air. | **Even high grade epoxies and finishes are not 100% impermeable to water and air. | ||
| + | |||
| + | *One recommendation is: after sandblasting, remove some more of the surface metal by sanding with sandpaper. This is done to remove the salt, sand, moisture, etc. from the surface. | ||
*After preparing panels, coating them with epoxy primer is recommended. | *After preparing panels, coating them with epoxy primer is recommended. | ||
| + | *Phosphoric acid or muriatic acid are recommended. | ||
| + | *Rust forms so quickly that if you are sand blasting, media blasting, etc., the surface rust will begin to form before you finish the job. | ||
==References== | ==References== | ||
*[http://www.hotrodders.com/forum/rust-what-acceptable-permanent-ways-get-rid-47303.html Acceptable ways to handle rust], ''Hotrodders Bulletin Board'', September 7, 2004. | *[http://www.hotrodders.com/forum/rust-what-acceptable-permanent-ways-get-rid-47303.html Acceptable ways to handle rust], ''Hotrodders Bulletin Board'', September 7, 2004. | ||
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