Hello Karen, my apologies for the late reply.
I’m so sorry you had this experience! It would be a little difficult to assume what happened exactly without me
seeing the vase and the process.
But I can try to take some guesses as to what my have caused that graveled surface look.
First I’m curious what type of paint you used?
When paint layering, if the paint is not adequately “chalked”, it can struggle to adhere to a glossy surface. Therefore, when you apply the top layers,
it will peel off parts and particles of the underlying paint layer(s).
Another thought is that the paint and/or the cracked patina could have needed more dry time.
I’ve had a lot of practice with these techniques and a lot of it is trial and error. But I always find that you can still turn a “mistake” into something
beautiful, it just might take creativity.
I don’t know if any of this will be helpful at this point, but I appreciate your feedback.