The way forward will be to cut off just a little that is down turned. This will give you enough pipe remaining to install a new garnish either screw job or welded.
When you then want to remove just be a down turned garnish to replace for that more oem look.
I did exactly that! I have been trying to get round to taking some pics and posting them on. Will do tomorrow after me washes it.
For those who also want to do this, I did the following:
1)Purchase a 62mm to 70mm diameter exhaust tip (honda exhaust 60mm)
Tip length of 145mm.
2)Remove plastic insert from bumper, very fidley indeed. You need to remove the 2x metal push clips (one each side of the trim) and a phillips head screw from the top of the trim. To get this out you will need a stubby/short phillips screwdriver as space is very limited.
3)Firmly press out the plastic trim.
4)use either a grinder or small hacksaw to cut of the down turn of the exhaust. I used a small hacksaw again due to space and i dont own a grinder. With a new blade and a bit of elbow grease this will cut of in a couple of mins of sawing.
NOTE . . . Leave atleast 10 - 15mm of the original exhaust pipe from the rear silencer or you will have nothing to clamp to! I know it sounds silly to point this out but better safe than sorry!
5)Mate up new trim to ensure a good fit before securing. I found at this point that for some reason the accord rear silencer point of to an angle towards the right hand side of the car?
6)I chose not to use the screw that came with the clamp as it looked somewhat..... well rubbish. I had the father in law hold the tip in position (point straight rather than to an angle) and i wizzed a 6mm drill bit through both trim and exhaust pipe and through the other side.
7)I used allen key headed bolts to put through the exhaust from inside out, the trim is too small to get your hand in so is helped being able to use an allen key to place the bolts. Then I place nylock nuts on the out side to clamp it up firm!
8)Jobs a gud en!
As stated I will get some pics up for those who want to see. It does give the car that little extra shine bit.