Two answers.
Provided that a Lay Member has pronounced these Four Affirmations before his Ruling and Teaching Elders and before his Congregation (as you and I have both done, upon entry into Communicable Voting Fellowship), it is permissible for a Layman Presbyterian to personally explore varying interpretations of Scripture and Tradition, provided that he does not deliberately contravert the commands of his Local Ruling Elders, or offer his Local Congregation a "Word of Instruction" (that is, a Lay Sermon) without the oversight of his Ruling Elders.
Having never taken Clerical Vows, I am operating within my Rights as a Presbyterian Layman to discuss the propriety of Orthodox Iconography, so long as I do not deliberately contravert the commands of my Local Ruling Elders (I have never done so, nor will I).
2.) IN THE SECOND PLACE, even the Presbyterian Clergy themselves have a Right of Appeal against anything, literally anything in even the Westminster Confession of Faith itself provided that they can prove their Objection to a General Assembly on the basis of Scripture Alone.
Even the hallowed Westminster Confessions HAVE been amended in the past; We Presbyterians submit even our General Councils and Universal Confessions to the God-Ordained Principle of Semper Reformanda, "The Reformed Church, Always Reforming!" ANY AND EVERY Confession of Bishops and Presbyters may always be subjected to inspection and clarification, under the bar of Sola Scriptura; as very well stated by the Eastern Orthodox Saint Brianchaninov:
Given, then, that the Ark of the Covenant represented the greatest Material Icon in the history of the Church, and was fully Biblical; I can, as I have said before, hardly begrudge the 10th Century Greeks their stained-glass Icons for converting and educating illiterate pagan Russians.
In sum: As long as we Protestants aren't expected to pray to Icons (sorry, we Protestants still feel that such an act would be Idolatry), we are able to appreciate the use of Icons for Education and Contemplation purposes.
And, as a Presbyterian, I am within my rights as a Layman to consider such things.
Best, OP
Just as long as you aren't required to affirm the Helvetic Confession of Faith.
But in fact in order to instruct men in religion and to remind them of divine things and of their salvation, the Lord commanded the preaching of the Gospel (Mark 16:15)--not to paint and to teach the laity by means of pictures. Moreover, he instituted sacraments, but nowhere did he set up images.This seems to me to suffer from the same fatal flaw that much of theology in the denomination I left did - an assumption that what is not mentioned is forbidden.