If you have done it before you know what to expect. I haven't done a Daewoo head either, but it looks straight forward. IF you look at the new replacements before you get started the design would alert you if there are any surprises.

When i did my etecII head i replaced all 16 valves, but did not do any of the guides, two had slight cracking and mushrooming, but i sanded them all smooth and used them without taking any out (like a mini port job). Worked great. The only issue my engine had was I also reused the lifters, i think they were damaged what the valves bent. So they were a little loud on start up and then had a slight tick while running. But it was on a super tight budget (repaired broken belt for less that $100). But I would look at tossing new one in if i was doing one now.