A.A Hodge's commentary on the Confession would be a good place to look for 19th century thought... (cf. pg. 274 of the Banner of Truth edition, 2002). He unequivocally says the Confession forbids Religious imagery.

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Benjamin P. Glaser
Pittsburgh, PA,
Fairmount ARP Church
Candidate Under Care Pittsburgh Theological Seminary & Reformed Presbyterian Theological Seminary
"The word of God is the measure of faith, and that is true saving faith, which believeth all things which are revealed, and in that manner wherein they are revealed..."
-- John Ball, Scottish Puritan (1585-1640)