Sharpening multitool blades

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Hello,
There are some excellent tutorials on the subject of blade sharpening :

However, what if your blades are so blunt that there is no gullet ?

Some of my old and very mistreated multi tool blades are so blunt that there is nothing left of the teeth, and I cannot make enough of a key in the blade to run a file over it to remodel the teeth.

Is there anything I can do or are these throwaways ?
 
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They are like Stanley blades , use and discard , though I keep a few smooth blades for scraping.
 
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protect your new blades
cut to within a few mm off brick plaster or nails with your wood blades then finish with an old blade
 
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They are so cheap these days, why on earth would anyone other than a professional Yorkshireman do this? :rolleyes:

I use a mixture of Japanese blades and bimetallic blades and I defy anyone to resharpen the Jap blades...
.
 
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Time is too valuable to waste sharpening cheap blades.
 
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Side grinding a cutting blade won't work all the time. I sometimes convert cream crackered blades into scrapers, but that's about all. Bulk packs of saw blades run you 80p to £t.20 a blade these days. To put that onto perspective, when Fein Multimasters appeared (mid to late 1990s) the blades were £3 to £10 a pop
 
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They are so cheap these days, why on earth would anyone other than a professional Yorkshireman do this? :rolleyes:

I use a mixture of Japanese blades and bimetallic blades and I defy anyone to resharpen the Jap blades...
.
As someone from the white rose county even I can't be arsed with sharpening multi tool blades.
Now let me practice the Yorkshire war cry HOW MUCH??
 

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