Paint on fece boards to remove/fade out

[grumpyoldjoe]

just finishing of a closed board fence made from old pallets and crates cut down to size.
Some pieces have markings and IDs painted and inked on them and was wondering how I can remove or fade these prior to using the fence paint spayer ?
Would it be a case of a heavy sanding session or maybe a chemical treatment ?
Thanks in advance

[stoneyboy]

grumpyoldjoe ,
You could try a pressure washer.
end