Cylinder Head Cleaning

[dom14]

Yea glass works with cast or alloy, have done it in the bush before but ill promise you that you will be blowning gaskets after 15,000km easy or less!
Its not only about the surface being flat but the texture and cut pattern also come into it - a good example is different bore hones and grades to suits what rings your using.
Good on you for giving it ago but for the $300 it would take to hot tub it and fly cut it, its not worth all the hassle and future repairs.
Do it once properly otherwise it will cost more anyway!

You can use fine grit sandpaper that costs next to nothing. If the gaskets blowup at around 15000km, then something's not done right.
For additional insurance, you can use a product like below.

https://www.autobarn.com.au/vht-copp...et-cement-sp21

Make sure to spray it on the gasket, never on the head or block. Let it dry for ten minutes or so before placing the head gasket on the block.

You can use a WD40 or something similar to get a superfine smooth surface(spray it on the sand paper), if a superfine smooth surface is a concern.

People have done it with heads upto 4 cylinders with success. I am yet to find out the success with my six cylinder head, but I am pretty confident.

I have seen that video and seems to work with an aluminum head, would that technique work with a cast iron one?

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Yes, I used the same table(with gritter sandpaper) to machine the stock exhaust manifold. It came out pretty good.