I'm not quite sure whether this site is okay for asking questions about drawing on real life objects.
For example, I want to make a caption on a plastic bucket and I want the caption to look good - of right size, with right letters, laid out properly, etc. Don't forget that a bucket is a truncated cone, so I'd need to first print (or draw) the caption elsewhere, make sure it's of right size and then transfer the contours onto the bucket surface and redraw it there and have the contours properly deformed to compensate for the cone shape of the bucket.
Would a question about specific techniques to perform this sequence be on-topic here?