when repairing the engine (and the more exact the cylinder and cylinder head) you should replace the cylinder head gasket.gasket, cylinder block is made of several layers of metal, covered with high-temperature sealant. The sealant stick to the surfaces and the removal pads without the destruction of the insulated layer is impossible. But as it is not always possible to order a new gasket or want to make it more subtle, to slightly increase the compression ratio, that is the way of the restoration of the old gasket.
The idea, in General, easy - clean the old sealant, to strike a new and set the seal. As a sealant suitable heat-resistant paint. And since I wanted to make a gasket thinner, then had to cut off the rivets and pull out the middle of the metal layer.

Clean the old sealant with the mating surfaces. At the same time, will not be superfluous remove carbon from the valves and piston. This makes sense if we plan to eliminate the cause of formation of the deposits, i.e. correctly configure the mixture, restore the compression etc.
For deleting old sealant I used acetone (you can use and other solvent). The contact surfaces was clean by the rag with acetone. And here's the piston valve and experienced the soft brass brushes, which was attached to the drill. Although the pre-most large pieces of carbon was clean by acetone, after which they were removed with a screwdriver. There should be careful and not to leave the details of the deep scratches.

i clean  each layer pads from old sealant . The average metal layer I threw it out, so I had to clean only two metal plates.

As a sealant I bought paint for exhaust manifolds, which is made on the basis of silicone and must be able to withstand temperature up to 800 degrees. In principle, this is a bust, but the price of such paint is not very different from the value of the ordinary.

Covered by metal plates gaskets, cylinder block two layers of paint, while giving each layer to dry up within 30 minutes. Spray paint must be from a distance of about 25 cm, with the need to follow to first, not formed drips of paint; secondly, the paint layer must be sufficient to ensure that individual drops of ink merged together, and did not form on the surface of a lot of separate drops of paint.

Covered by metal plates gaskets, cylinder block two layers of paint, while giving each layer to dry up within 30 minutes. Spray paint must be from a distance of about 25 cm, with the need to follow to first, not formed drips of paint; secondly, the paint layer must be sufficient to ensure that individual drops of ink merged together, and did not form on the surface of a lot of separate drops of paint.
PS all of the patch did not I. but the method was tested by me personally.(I think, it may be useful)
p.p.s. the picture for some reason not displayed. guys may be you'll have to insert pictures. references to them are listed in my post.

I beg your pardon Oldfeller. I just inexperienced and because of the difficulties with the English do not read your post. it is possible that your method is better, but so far I have not felt myself I found this article on another forum and decided to share...