From my understanding the paint should survive with the plastic welding and rods.
It is really very simple, kinda like working with bondo and fiberglass sheet.
-I wipe down the area(s) with acetone. Makes it clean, porous and kinda sticky (no worries).
-Mix the two part ABS plastic repair (i get it from AutoZone). Many parts stores will carry it, I think it is called permatex or something similar (pickish background).
-Put the mix over the crack or the two parts and let them dry a bit. Wont take long.
-I lay a piece of fiberglass sheet while it is still soft and push it in. Trying to get it in the weave.
-I mix another small batch and lay it over the top of the area. Push it into the weave.
-Let it dry.
-Dremel to clean it up and make it look nice.
This mix has never broke, hard as bujesus. Now, high stress stuff will break around it but not what you have done (to me, there is no real amount plastic on em, early Honda's). I have a bunch of tabs that like to break as it is is old weather beaten ABS. Few have broken around the fix. But then, when it comes down from standing her up on the back wheel, a tab likes to let go, lol.
I have filled holes like this that is about an inch radius.
If you have seen my XVZ12DN, there is SO much plastic, it is crazy.
