To remove a spot of vaseline from a light brown boot, apply a thick solution of white guttapercha, or pure rubber, in bisulphide of carbon. It is the same thing as patching cement, only that it needs to be much thicker. A small bottle of cement evaporated, and the residue added to a bottle newly opened, will answer the purpose. Paint all over and just beyond the stain, and when all the spirit has passed off rub off the guttapercha with a clean rag; if not successful, repeat. The guttapercha that has been rubbed off can be used again.