How frequent does the oil need to be changed?
The water used in a conventional water wash booth has to be changed periodically or constantly drained off, but with the Oil Booth this is not necessary. Since highly pure mineral oil is used, putrefaction or deterioration do not occur. Since paint sludge is being removed constantly, the oil can be used semi-permanently. (It may be necessary to change the oil after performing coating with water soluble or UV coatings in some cases.)
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