According to the Protestant denominations that hold to the doctrine of clarity of scripture, is Trinitarianism clear?

The doctrine of the clarity of Scripture (often called the perspicuity of Scripture) is a Protestant Christian position teaching that > "...those things which are necessary to be known, believed, and > observed, for salvation, are so clearly propounded and opened in some > place of Scripture or other, that not only the learned, but the > unlearned, in a due use of the ordinary means, may attain unto a > sufficient understanding of them". Westminster Confession of Faith According to denominations which hold to the doctrine of the clarity of scripture, is Trinitarianism something which is necessary to be known and believed for salvation, and therefore clearly propounded and opened such that not only the learned, but the unlearned may attain to a sufficient understanding of them?