It took 4 days to finish up,that's easy..
Here's the tools,and some Gundam Markers I use(forgot to put black and silver color).
Day1 to 4 -
Day 1 - Its too early to make me dissapoint for the Core Fighter,because there's one part got bended once I want to cut it down(red marked circle).Luckily,its still can fixed.
No problem for the head,body,waist,and the booster pack parts,just added a bit of details on the inner frame.
Day 2 - Finish up the arms part,and I also cut the sticked finger part into separate fingers.Plus,its fun to play with it...^ ^(picture with the "CENSORED"word,I'm so sorry for those who hate this = =)
Day 3 - Finishing the leg part,and guess what?!I took 4 hour to finish it,and I finish it before 12am that time..(plus adding details again) =p