If you have an old whetstone, use it to dull the corners.
Also, try to get a Weck or at least one of the "hair shapers" that use the single-edge blades with a spine -- much better than a DE-style.
Actually, my 1st shavette was a Weck clone and got a good shave without incidents. Funny thing, when I showed my purchase in another forum, a shavette "expert" jumped and told me that those things can't shave well because the metal comb ... And I love that I can use it to trim and flatten my hairy sideburns using that comb...
Cheers