Try one of the spray-on polyurathane foams. You can buy them in small cannisters and they are easy to texture ( with knives and drill bits) and come in different densities. You can also mold from a cast if you wish. Robert In article <[log in to unmask]>, exhibiter <[log in to unmask]> wrote: > We are preasently building a Mesozoic gallery with many marine > fossils. Most of which are in plaster and framed in wood. after they > are mounted in the exhibit we are plastering up to the frame with > molding plaster (wire mesh underneath) but do not want to cover the > the screws with such a hard meduim (in the case of removal). We also > would like something that is easier to model over a longer period of > time vs. the molding plaster, which after it set's up it is Set Up. > In discussions here we have talked about the use of drywall mud. > To me it has all the qualities that we're looking for plus a > consistancy of spreadability that I would like. Though we do > not know how it would react to the fossils in a closed environment. > Does anyone know how safe it is or anyone who has used it or > have any suggestions/alternatives as to what we can use. > > Thanks > Scott Clarke > Univ. of Nebr. State Museum -- Robert O. Dahl <[log in to unmask]>