I picked up a great well rooted Atropurpureum,and plan to use it for a Bonsai. The trunk at the roots is about 9"-10 " circumferance.The roots and trunk are sound and about 4 " up about half the trunk and a secoundary trunk are dead. The deadwood is still sound and I would like to incorperate it into the Bonsai design. I have used lime sulphar as a wood preservative on junipers, and pines with good results, But I am concerned about washing the very alkalyne (?) lime sulphar from the wood into the soil and damaging the maple roots. Has anyone had any experiance with lime sulphar and maples?. Are there any other wood preservatives , I could use? Thanks for any advice. Dave.