Well, the work is almost finished!! I have cleaned the handle, the blade, etched the blade (but the pattern is visible just a little due to the rust pitting
, anyway maybe you can see something from pics and I assure you that is more visible if you look
de visu the blade). First I have tried with vinegar, but I wasn't able to bring out the pattern and so I have etched the blade with ferric chloride. I have attached the blade with the hilt with a lot of epoxy putty (Milliput white) and than I have used what here in Italy we call "PECE GRECA" (conifer resin) with colored (dark brown) wax bee to harmonize the conjunction between blade and hilt (but i have to polish the "PECE GRECA" with some steel wool). A lot of work, but the result is quite satisfactory
. So thank you all for your suggestions and specially to Brian!!!