The phrase "most fine spun" typically refers to something that is elaborately fabricated or exaggerated. As such, antonyms for this phrase might include simple, plain-spoken, straightforward, or understated. A more basic or straightforward approach may be preferred in situations where complexity or artificiality is not desirable. Similarly, words like honest, genuine, and authentic may also serve as antonyms for "most fine spun," as they emphasize sincerity and straightforwardness over artifice or exaggeration. Ultimately, the choice of antonym will depend on the context in which the phrase is being used and the qualities that are most important in that context.