Here are pics of a 71 TA's rear axle I did this past spring. Made it thru the spring and summer without a speck of rust. Anyone who knows how humid it is in Memphis will attest recently blasted metal will flash rust in hours during the heat of the summer- especially cast like the pumpkin shown here. If you look close you will see traces of amber looking color, that is not rust, it is the remnants of the cosmolene. Cosmolene is amber waxy material. Guys, if you want your bare metal to always look like bare metal, use cosmolene. FYIY, OEM's like Mercedes and BMW have coated the undersides of their cars for ocean transport to the US for years. Military have packed guns in cosmo since WWI..Still amazed it is not used more frequently in the resto buiz.. Just search for mil grade cosmolene and you will find chem companies that sell pints or quarts as well as 55 gallon drums.. I gave up using paints years ago, just never looks like metal up close. Guess paint is ok for "1o footer" but if you really want bare metal, you will have to use something other than paint. Then again, the judges at shows seem to all use paint, so not sure it will cost you ,actually will probably gain points even though not technically correct.. good luck.
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