Seam sealer fail - help

Maybe I can salvage this job, but on my 66 dart, which I scraped out all the old seam sealer at the roof drip edge. I used Dynatron 550, tape, and mineral spirits. I thought I laid it in nicely.
Been 2 days, start removing the tape and too much overlap and it pulled away from the roof and looks horrible. Tried razor cutting some of the crappy bits , but it is not working. So can I apply another bead of Dynatron right ontop? Or do I need to remove it all and restart?

Also I am planning on painting ontop of this , is that alright??
helpp