An interesting link on restoring, replacing, or repairing high-voltage capacitors in old equipment, e.g. multi-section 450V. Covers safe re-forming of existing capacitors, various replacement ideas, how to replace capacitor without changing the appearance of collectable equipment. If you pay, you could even get a capacitor rebuilt within the original can, until the one and only expert died.
http://www.nmr.mgh.harvard.edu/~reese/electrolytics/
http://www.nmr.mgh.harvard.edu/~reese/electrolytics/