Can StudX be Applied To Timber Painted With Kentucky Horse Fence Black

The timber painted with Kentucky Horse Fence Black needs to have weathered. Generally for 6-12 months minimum.

Water Beading Test
Wet the fence with water. If the water beads due to the Kentucky Horse Fence Black, you will need to wait a few months and do this test again. 
If the water does not bead, then you can proceed with painting the fence with StudX