Yes use a brass drift. Or as you said you'll have to buy a new or used hub. The brass will flake off as it is used. that is because the brass is softer than the steel and the brass gives way instead of your hub. Make sure your tap the race in a circular fashion going around the edge, hitting the race every 10-20 degrees of its complete circumference. That way the race will not jamb in the hub.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car