Adam Clarke on 2 Chronicles 4:22

The doors - were of gold - That is, were overlaid with golden plates, the thickness of which we do not know.

That every thing in the tabernacle and temple was typical or representative of some excellence of the Gospel dispensation may be readily credited, without going into all the detail produced by the pious author of Solomon's Temple Spiritualized. We can see the general reference and the principles of the great design, though we may not be able to make a particular application of the knops, the flowers, the pomegranates, the tongs, and the snuffers, to some Gospel doctrines: such spiritualizing is in most cases weak, silly, religious trifling; being ill calculated to produce respect for Divine revelation.