I would have only treated the part that was rusty, as those bushings pop out badly if the control arm is shiny smooth.

As long as you got them between the "horns" on the frame, they are fine.

We left my brother's rough, just scraped the old rubber off and stuck the new ones in with a bit of silicone lube, and still have trouble.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!