Rust
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*Body panels can be sand blasted. However, it must be done carefully. The pressure of the sand hitting the body panels causes warpage. | *Body panels can be sand blasted. However, it must be done carefully. The pressure of the sand hitting the body panels causes warpage. | ||
*There are so many different products and approaches for handling rust, that it can be mind-boggling for an average hotrodder. | *There are so many different products and approaches for handling rust, that it can be mind-boggling for an average hotrodder. | ||
| − | *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? Also, it's noted that the major paint manufacturers like Sherwin Williams, PPG, and DuPont don't produce a POR-15 like product. This is thought to be because they couldn't possibly warranty such a product. The fact that POR is not used by manufacturers is also important. |
*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: | ||
**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. | ||
**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. | ||
| + | *POR is largely considered a "short cut". It may be OK for the home hobbyist, but it's not considered the "right way" to handle rust. | ||
| + | *Brands: POR-15, Zero Rust, Eastwood Rust Encapsulator. | ||
*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. | *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. | ||
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