Getting them blasted is a good idea and will give a better fit and keep the bushes in better condition.
The front steel lined bush I would on a road car probably go rubber. They last fairly well and I am not a fan of bonded poly bushes. For the price they are on a typical road car might not be worth the risk.
The rear bush I would drop the poly bush in there and then know it job done.
As you have spare arms I would drill and tap for a grease nipple so you can quickly service the poly bushes.
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