I have some antique (100+ yrs.) oak chairs that have developed cracks in the seat. In a previous question I asked how to better support the seats. Now I am finally getting around to working on them and want to re-glue the splits that have developed over the years. Some cracks extend across the full length of the seat and these can simply be clamped and glued as any other wood slabs would be. However, some cracks do not extend the entire length of the chair (front to back) and getting the glue in the full depth of the gaps will be difficult. I have never injected glue and am not sure what the best varieties and techniques would be to get maximum contact and the highest glue strength. Any recommendations and discussions are welcome.
There is also some areas where thin splinters of wood have been lost and I would like to fill the gaps for a finished look. I have considered using clear epoxy but am uncertain what dyes or colorants would give the least obtrusive appearance and accept new varnish finish well. Again any recommendations are welcome.