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Question:

I just cleaned the cylinder head mating surface with a die grinder wire brush did i screw up?

i cleaned the surface with a wire brush, it didn't leave any groves or scrapes but the shade of the surfaces i cleaned changed, and i had aluminum flakes all over my gloves.i just read in the manual that i should use gasket cleaner and a plastic scraper.please tell me i didn't screw up

Answer:

i was taught by a professional chef to use the dull side down.
i don't think so but to be safe, put shiny side on the outside.
The dull side should be on the inside and the shiny on the outside.
The radiation will act like light and the foil shall act as a mirrorKnowing now that you want to transmit (foil to absorb all radiation) as much IR through the foil as possibleIt should be clear to you that the dull side should be OUTWARD facing so as not to minimize the reflection of IR radiationThe shiny and dull sides of aluminum foil come about because of how it is madeAluminum foil is made by rolling sheets of aluminum between pairs of polished steel rollersThe process is repeated over and over until the aluminum is squeezed thin enough The catch is that aluminum foil for kitchen use is so thin that it's hard to work without it tearing, so the last rolling step (to get down to 0.0005-inch thickness) is done passing two foil sheets together facing each otherThe sides that face the rollers get very shiny.
Ya that is not the right way to do it especially on an aluminum blockOne of the many issues is you have also knocked a bunch of metal into your rings If this is a 'good' engine and you want it to last you should probably tear it the rest of the way down and take it to a shop and have the deck surfaced If you are going to do this before you tear it down you should CC itThis way you can do a compression calculation after the shop lets you know how much they had to take offYou will also need to know how many CC's your heads are.

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