Since no one has responded I'll bite;
I'm not familiar with the Sentman delux, but with doing a quick search it appears to be a longbow (ie: not a recurve). It is going to be pretty tough to reduce the bow by 10 lbs. I'm pretty comfortable in saying you can't do it by only removing material from the sides or edges of the limb. Again, without being familiar with the bow or bowyer I couldn't tell you what percentage of the limb is made up of the glass, obviosuly this is the only lam you can sand the face of. If your comfortable and set on the reducing the weight, I would start with the edges and round the limb profile. You could trap the limbs to the face or back, but your not going to reduce much going that route. Take your time, it will take some time doing it by hand with some course sand paper. Check the limb as you go so everything stays in line. See how much weight you can remove and then start with the glass. Again, if the bowyer used .040 glass as apposed to say .050 you will be able to remove less of a pecentage of the glass before you start to compromise the limbs integrity. Long story short - You will be able to remove some weight, probably not 10 lbs, and if you're not really comfortable in doing this I'd send it to a bowyer and see what they'd charge to have them do it for you. (Since you say "you have no experience in bow making" I'd would suggest you pass on this one and get a bowyer to take off some weight).