FYI: When I had a genuine AMG rim crack repaired by Lepsons, I asked if I could watch.
The process is, in itself scary. They hacksaw the crack out. This (I was told) stops it spreading when filled with weld. When completed it was not that pretty. But as it was on the inner lip, it was not visible. True to their word, the wheel remained good, despite needing straightening (again by Lepsons) after I hit massive pothole a couple of years later. The weld was still intact and no evidence of any spread.
So it may not look pretty? But if its a good job and not visible then it should not compromise the wheels integrity.