In revision, I came across a pretty sentence that unfortunately alliterates. I love the imagery of this sentence:
Black smoke from its stacks stained the cerulean sky.
This isn’t a poem, so alliteration–especially accidental–isn’t a good idea. I really wanted to keep that imagery. Here’s how I revised it:
Black smoke from its chimneys stained the azure sky.
Not quite as pretty, but hopefully it still works.