Configuration of channels in accordance sector?

[checosfm]

Hi, I have assembled a network with 3 pico2hp, which are each connected to a 120 ° sector antenna, 14 dbi, a tower 60 meters tall, each of the peak is in the same channel (1 ), the question is this good or channel configuration that would put a different channel to each of them.

P.D. Using a translator, I hope you understand me.

[along5664]

Use a different channel for each radio....1,6,11 is the ones in the US that do not overlap.

[checosfm]

Thanks along5664

Other 2 questions, really should put the filter to improve signal quality?
I also want to paint the sector antennas for camouflage in the tower, I think this is necessary to paint with lead-free paint, correct?