THIS PAPER PRESENTS A CASE HISTORY OF A SUCCESSFUL EFFORT TO PREVENT RUST. THE PAPER DISCUSSES THE HISTORY OF THE PROJECT, IDENTIFIES THE ROOT CAUSES, REVIEWS THE COMPREHENSIVE PRODUCT TESTING PROGRAM AND PRESENTS INNOVATIVE APPLICATIONS OF THE SOLVENT CUT BACK PETROLEUM PRODUCT WHICH WAS SELECTED. THESE UNIQUE APPLICATIONS WERE DEVELOPED DUE TO THE NEED TO PROTECT PARTS PRIOR TO HEAT TREAT AND TO REPLACE WATER IN A LEAK (BUBBLE) TEST TANK.