Originally Posted by
sw74gls
Hi guys I have spent almost a year now scouring the Internet trying to find an answer to how u can remove severe oxidation from casings I had previously used Gunk ultra on my engines and if you were not more than five minutes it would not corrode or oxidise, however a friend suggested a so called excellent parts cleaner which I was told to pop out and come back five minutes later I did this and I was totally shocked when I came back as it had started foaming the result being it turned nearly black all over !!! Is there anything I can use to bring the casing back to an original cast finish please? ??
if I can find a way I haven't lost a nearly new nineties hanno special 61RF casing plus some of my earlier engines with slight corrosion could be restored I am fingers crossed someone can advise me on this? ? Many thanks Simon.
I've posted the response below on the diesel forum where you've probably mis-posted your plea.
I'm a volunteer on a warbird restoration. We had the old girl's fuselage "glass bead" blasted to get rid of 75 years worth of paint, corrosion, stains, bird droppings etc. Imagine a spraygun that uses a high pressure stream of tiny particles to clean a surface. Worked marvelously and was remarkably gentle on the Aluminium alloy surface. Environmentally friendly as well.
Hobbyking sell a cheap airbrush "Bead Blaster". I did buy one of them, and tried it with "Soda" ( Sodium Bicarbonate or Baking Soda ) on a sheet of paper with ball point pen notes written on the surface. After a bit of fiddling around with settings I was able to completely remove the writing with little surface damage. That was just a test at the mild end of the range. Such a system should work well on your problem if all else fails. People do bead blast model engines with good results. You can probably tell afterwards that it was "blasted", I can in ebay engine pics. However the results may be much more acceptable than what you have now.
https://hobbyking.com/en_us/single-a...sting-gun.html