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  • I need to slightly widen a 10'ish mm rebate in a door frame (it holds an intumescent fire strip).

    Ideally, a 10mm straight router bit would get rid of the paint and widen it enough but I don't have a router.

    Apart from sanding down the entire rebate (which would a PITA and take ages) is there a crafty way to do this?

    I've considered getting a router bit, putting it in a drill and letting the existing rebate guide it.

  • Plough plane?
    Looking at eBay 'sold' listings, around £20 for a usable Record - you'll probably still need a chisel for the ends...

  • Either way it’s a pain in the arse.
    Mark it up first with a marking gauge or mortise gauge.
    Rent a router and use a bit narrower than the groove width you’re aiming for.
    You’re still going to have to finish the last 6” with hand tools.
    If you try to create a 10mm groove with a 10mm bit it will not work, you have to use a narrower bit and relieve each side.
    You cannot use a router bit in a drill, they are all too slow and uncontrollable.
    Or... a chisel and mallet.

    This is a rebate.
    https://www.wonkeedonkeetrend.co.uk/media/wysiwyg/Trend-router-cutters/rebates.jpg

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