Hi all;

I have a bothering problem regarding an OS AX .46:

I got a badly varnished and gummed engine (on the outside), which looks like new on the inside.

The engine was used on a trainer, and left over un cleaned for a quite long period of time (not by me – I treat my engines much better).

I took this engine apart, examined it’s parts, and apart from it’s bearings which are being replaced with new ones, everything seemed to be in a perfect condition.

In order to properly remove all of the gummed and “fossiled” dirt off the engine, I took the following action:
I dissolved a tablet of dishwasher cleaning agent in warm water and soaked the engine Aluminum parts in it.

The dirt dissolved in minutes and was very easily removed off the engine – great outcome so far.

But…. All of the engine Aluminum parts (muffler, engine head, carb. body, engine body) got severely stained – the Aluminum was discolored from it’s natural silver-like color into a Led-like dark gray color.

Please – if anyone knows of a method – other than mechanically rubbing this layer of staining off – to remove that ugly gray staining – share the info

Thanks in advance

Yaron