I bought a used Brooks for my new mixte a while back. It arrived in the original box along with paperwork from Wallingford Bikes. I'm just now getting around to proofiding it. I've always read on TE to put several coats under the bottom and on top.

The paperwork says APPLYPROOFIDE UNDERNEATH ON PRE-AGED SADDLES, NEVER ON TOP.

Why is that? Mine is not a pre-aged saddle. I don't think.....