Huuuge thx for not helping folks... Took me long while to ficure this out.
Well, BEING NICE i'l just tell how to do it.
Go to surfaces, create "offsets" about 1mm away, then just extrude thru the new offsets and then go back to surfaces and use the offsets to cut the extrudes. Boom. Nice 1mm tall extrudes matching the surface they are in.