When you are installing a new spanish or mid BB always put some grease or anti seize (that comes with flatware cranks) on the outside of the bearings and into the frame so they don't weld together and use a rubber mallet when installing or removing them. You can also put just a little grease on the inside of the bearings when installing the spindle and cranks, that way you will be able to remove the BB and cranks after years of usage with ease.
I was putting together a new Razzia last week and removed the Flatware cranks and BB in a few minutes after 2 years of riding them with just a few taps of the hammer.
In bike fixing its "Hammer and grease so it slides with ease"