You could adjust them by using a file to remove a bit of the pad's braking surface toward one end. Take them off the bike first, you don't want to nick your new paint job.
If they aren't very noisy now, the pads will wear down parallel to the rims eventually, toed in or not.
This Park Tool brake adjustment page might help you, too:
...flexible and less expensive arms tend to squeal more than stiff calipers of better brakes. It is possible to reduce squeal by having the leading edge of the brake pad strike first. This tends to reduce the back and forth jerking of the arms.
Some brake caliper arms can be toed. Toeing can be achieved in some cases by bending the caliper arm slightly using the Park Tool BT-3. It is best to use two BT-3 tools at the same time. This will minimize stress on the center pivot. Begin with a slight gap at the back of the pads and test the bike before adding toe. An option to toeing is to file the pads so the leading edge strikes first.