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. | ||
| − | * | + | *Some people mentioned 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. | ||
| + | #Rust prevention products are primarily advertised in hobbyist mags, not in periodicals read by professionals in the paint and body industry. | ||
| + | #The lack of rust preventive products in non-hobbyist industries does appear suspect. For example, why don't ships at sea use POR-15? | ||
| + | #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. | ||
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| + | The fact that POR is not used by manufacturers is also important. | ||
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*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 "duct tape fix" or a "git-er-done" solution. It may be OK for the home hobbyist, but it's not considered the "right way" or the "professional way" to handle rust. | *POR is largely considered a "duct tape fix" or a "git-er-done" solution. It may be OK for the home hobbyist, but it's not considered the "right way" or the "professional way" to handle rust. | ||
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*Another argument against rust "treatments" is that many of them require the surface to be lightly rusted first. "Inducing" rust seems wrong to people. | *Another argument against rust "treatments" is that many of them require the surface to be lightly rusted first. "Inducing" rust seems wrong to people. | ||
*Rust-protection products can either act as a coating, or as a sacrificial anode (explain). | *Rust-protection products can either act as a coating, or as a sacrificial anode (explain). | ||
| − | *Sand is not recommended for media blasting panels. | + | *Sand is not recommended for media blasting panels. It acts like little hammers, caused by compressive forces (analagous to hail). Use softer media (list examples). |
*If POR and similar products have a "lifetime warranty", explain how guarantees like that don't involve labor costs, losses, or other related costs. | *If POR and similar products have a "lifetime warranty", explain how guarantees like that don't involve labor costs, losses, or other related costs. | ||
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*Many panels have seams, hems, and bends that are inaccessible by blasting, and hold moisture and rust. | *Many panels have seams, hems, and bends that are inaccessible by blasting, and hold moisture and rust. | ||
*Why do older cars rust more quickly? Theories are: | *Why do older cars rust more quickly? Theories are: | ||
| − | **Cars are more aggressively coated these days. Galvanizing ( | + | **Cars are more aggressively coated these days. Galvanizing (explain). |
**Steel used in cars is of a higher quality these days. | **Steel used in cars is of a higher quality these days. | ||
**More salt is used on roads these days. | **More salt is used on roads these days. | ||
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==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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