Step 5 repeat the steps if necessary until the oil stain is gone.
Remove oil from sheet metal.
Very simply oil canning is the result of uneven metal flow during a drawing operation.
The purpose of massage oil is to enjoy its soothing effects without having to worry about stains.
An oily base metal will repel the flux.
This will leave bare spots that will oxidize under heat and create voids.
Oil removal from steel prior to patination.
It often can be seen in the walls of deep drawn square or rectangular shells see figure 1a and figure 1b caused by the imbalance of metal flow into the drawing cavity see figure 2.
It is essential to remove oil and grease for a lot of reasons.
First put on a pair of rubber gloves a dust mask and some protective eyewear.
Unstrained or loose metal in a stamping can result in an oil canning effect.
To remove rust from large metal items you can use an acidic rust removal chemical treatment.
Buff your metal piece to a shiny luster with a soft nonabrasive cloth.
Wd 40 is safe on metal.
Remove the excess with a soft cloth or paper towel.
Working with rust removal chemicals can be dangerous so make sure you take the proper safety precautions.
You must remove all oil and grease.
Oil and grease will also carbonize when heated and form a film that prevents solder from flowing over the carbonized areas.