Primer lines need to be silver soldered into their fittings. Using RTV to fix a leak is not acceptable and poses a serious fire hazard.
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A different approach to a popular modification. By Brad Benson.
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After checking with a variety of aluminum polishing aficionados, author Bob Fritz came up with a winning combination for maintaining the shine on metal airplanes. He details not only which products to use, but also how to use them for maximum effectiveness with minimal elbow grease.