It looks like the end of your crank has heated up to 250 to 300 degrees C in places. There is a ring there.
Make sure that the loctite you are using is appropriate.
Keep in mind that there are many visable gaps between your flywheel and crank that fastening fluid could flow into, now that the crank face is damaged.
There may be thermal effects that act upon excess leaking fluid that could cause uneven pressure between the mating faces and in turn loosen bolts again.
Imho if you install the flywheel with oil on the threads, torque it up and it has no runout then you "might" be okay to pull it off, clean it up and fit it with loctite.
To ensure minimal leakage in this case, I would pull the flywheel in with a few dry bolts to minimise the gap and then fit sparingly loctited bolts (to reduce leakage into pitting) alternately to removing non sealed bolts.
Imho this is still half assing it and I'd prefer mating surfaces to be 100% flush, especially close to threads. If there is a gap it provides room for the bolt to flex.
You might get lucky by slapping it together again but I wouldn't recommend it.
Good luck mate and hopefully this post helps you out with whatever you decide to do.