You can pick up ferr-l-tite at Al's or possibly Cal-Ranch. I use a hot air gun to melt it, I don't burn the finish that way. Your finished arrow weight will depend on what type of wood is used. Most of my cedars weigh 500gr to 550gr, ash is in the 600's, maple typically weighs in the 700's, poplar and doug fir weighs 500-600 gr. Aluminum and carbon may shoot better, but building wood arrows is funner, and they smell good when they break.