i recommend
www.braintan.com ... it will help you greatly providing you have the brain... if you do not then look up an old hemlock tanning recipe providing you have hemlock in your area... my family uses hemlock as well as brain tanning so if you have any questions feel free to email or IM me and i' ll be happy to fill any gaps... i warn you... be VERY careful with hemlock.. if ingested or used in the wrong way it is a VERY deadly poison... there are also store brands of tanning oil but i find that the old ways work best