I decided to have a go at planing the top to remove the bow. I consider myself almost a complete novice with a hand plane and it's only over the last six months or so that I've learnt how to fettle an old plane and sharpen a blade. I've built up a small collection of secondhand planes now and I've even treated myself to A Veritas Low Angle Jack plane recently, which I love. Nevertheless, the idea of flattening such a large surface was very intimidating. My limited planing experience extends to dimensioning 18mm MDF edges whilst making smaller bits and pieces. I almost decided against attempting it and was tempted to use the router surfacing method. I don't have the correct cutter and it would have meant splashing out £25-£50 on a new one, an expense I could do with out at the moment.
Anyway, with plane irons freshly sharpened, I set to work.
I began by using the Low Angle Jack, then had a try with the wooden plane. I went at it a little too heavy handed I think and suffered from quite a lot of tearout. A lesson learnt.
Tearout aside, I was making progress and the bow in the table top appeared to be diminishing, slowly but surely.
My latest purchase for the grand sum of £2 was an old and rusty Stanley No. 4 1/2.
I sharpened the blade and cleaned it up a little.
...and gave that a whirl. It was an absolute joy to use and I kind of got into a rhythm and made a little more progress. I was thoroughly enjoying the planing by this stage and getting a little more confident.
I managed to get the worst of the bow out and called it a day.
Other commitments meant a break from the task for a couple of days.
Back to it and I decided to remove the remaining, thick, heavy varnish on both sides of the table top with a belt sander and a 40 grit belt.
My cheap and cheerful Parkside (Lidl) sander worked flawlessly and quickly made short work of the varnish removal.
I sharpened my Stanley 4 1/2 and set to work flattening the top a little more. This was coming along nicely and I couldn't believe just how well a rusty old £2 plane could perform. The blade appeared to take a really good edge and just seemed to go on and on with no noticeable dulling. My planing enjoyment has increased tenfold since using this particular plane.
The top is now acceptably flat and has been cut down to the appropriate width. There's still a few small areas of tearout from my initial attempt, but I'm not too concerned. It is a workbench top after all and will soon get lots more imperfections from use.