Painting on metal, offering advice
 

Fragment of painting "Last Supper" done on zinc butter in a side light. Most likely this is a piece of the iconostasis. Across the surface of strong deformation on the mechanical effects of a sharp object on the reverse side. Paint in these places was preserved. I need advice as to align the deformation without damaging the paint layer. If someone faced with the - help, I will be grateful))))

From the perspective of an expert on construction
 

1) It is impossible to bend sheet metal back, if not exert pressure on the opposite side. If you knock on the front side - just corrupt the paint.

2) Or, drilled small holes in the steel wire that passes and try to pull the bulge back. The wire is attached with the front side with a steel ball or do loop, which pass through a very brief piece of steel wire. If you pull a solid, relatively thick wire (1 mm), then bends her end of the L-shaped 2-3 mm. Or use the corresponding L-shaped tool. Is that clear?
This method provides no guarantees of full alignment, will necessarily uneven, but the smaller size. In the process of extraction can be damaged paint a diameter of several mm. from the hole. Hole-mask will restore.

3) I have carefully removed fragmented paint layer. Then he would calmly arched sheet and stuck a piece back.

Question: Judging by the photo, work has already been decimated. If it will be fully restarirovat, redraw - the loss of even one small piece is almost invisible. Is there any historical value of the sheet metal? It may be easier to draw a new picture, and leave it as a sample?

I would not be touched at all. (Easier to make a new zinc)

For zinc metal and require special primers - primers.

Chito vie mean? Once I was on a metal tray (stainless) palette divorced-so-so withered that so far I can not peel (you can give me the recipe?)

It's one of the "laws of the sandwich. I myself came up with:

"Cement has a habit easy to keep up with surfaces that are long and carefully prepared for work. But kept tightly wherever accidentally sprayed."

That's about the paint from your tray can be paraphrased.

Professional restorers are like no, but a serious question.
NATA NOVA, Chernomashentsev Vladimir,-people are very far from the Restoration (listen to their advice does not make sense).
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You better go to a specialized site (where collected restorers), there is a forum where you can ask a question.
Site dedicated to the art of restoration and everything connected with it. http://www.art-con.ru/

Thank you friends))) I will try all the same it vyrovnyat.Potom show what happens:)

I agree with this statement. I have this and entered in the title of your post. For me you can pay attention only with regard to the alignment of the sheet of iron - as I understand it, this is the main problem. Judging by the questions posed.

The main problem is to keep painting ..