Stripping paint
(→Media blasting) |
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====Media blasting==== | ====Media blasting==== | ||
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| − | + | Blasting with media that removes rust is one way to ensure the rust is removed from the bottom of the pits. Contrary to what the advertising would tell you, most chemical methods do not fully remove the rust from the bottom of a pit. Sanding to the bottom of a pit is likely to warp the panel through heat and the fact you are making the metal thinner. | |
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| + | Warpage of the metal is a common worry, but no an issue if one understands how and why the metal warps. The metal warps because of expansion of the surface of the metal from the impact of particles. A small amount of impact will not cause enough damage to do anything more then make the surface a little bit rough. When the media is given enough energy through speed or density (faster or heavier hammers) then you will get the surface expansion that causes warpage. | ||
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| + | To blast safely you need to run a low pressure and limit the amount of media in the stream of air. This will mean a much slower removal of material, but no chance of panel damage. One setting that has worked is 40 PSI on the pressure pot blaster and open the media valve just enough to see the sand mixing in the air. This setting will not damage the metal even with prolonged working in one area. | ||
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| + | The siphon blasters are more likely to cause warpage. This is because you can not easily regulate the amount of media in the stream. | ||
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| + | Keep in mind more significant more panel warpage is done while trying to repair a panel. | ||
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| + | See [[Media blasting]]. | ||
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| + | Soda Blasting has become popular recently. This method uses Baking Soda, and is very effective as it will not damage the glass, plastics, chrome and rubber on the vehicle when used properly. This means that a car can be stripped with all of the parts still attached (if you wanted). Another method of of blasting that can be useful is plastic media blasting it is cheaper than soda blasting and can be used in the same instances, but special care is needed. Soda blasting does not remove rust. | ||
====Orbital sander==== | ====Orbital sander==== | ||
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