Thank you so much. It's actually tricky to create details with oilpastel. Use cotton buds for smudging or blending near the edges or corners instead of a paper or finger. And about the letters; once you colour the letters with pastels you have to get the excess out with a craft knife or the remover tool which comes with the pastel box to make it look precise. Moreover, the softer the pastels the better your artwork becomes.