Some of my bulbs have rust looking patches. I understand that this might be “Red Blotch”.

Question

Is there any way to save these bulbs…what causes this, can they be saved, what do I do in the future?

Answer 1

Your bulb has contracted a fungal disease. Since you seem certain it has red blotch, I'm giving you a link to an article about this disease, as it affects the plants as well as the bulb:
https://www.gardeningknowhow.com/ornamental/bulbs/amaryllis-hippeastrum/amaryllis-has-leaf-scorch.htm

You may be able to save the bulb by letting it dry out, but if the fungus is extensive or deep, you may need to dispose of it. This kind of fungus occurs due to too much water or prolonged overly-moist conditions.