I'm always careful with anything that can build up pressure and release hot grease suddenly.
I'd probably disassemble and weld just for safety reasons - been sprayed with hot grease, brake fluid, and oil a few times and I'm a little gun shy now
Took it all apart. Luckily it was bushings inside which made it quick and easy to clean out. With the help from a buddies company service truck we Welded the knee back together then threw spindle and tire back on. Now it's sitting as pretty as it can again!