"I was gonna respray it half way up the pillar and use reducer to melt the edge."
"Or should I just suck it up and knock the roof and other quarter down with 800 and respray it all? "
"I think I just answered my own question. Lol."
You could try whatever 'blending' hoo-hoo you like BUT it WILL
come back to haunt you in 12 - 18 months. It really is much easier to do it right once than damage your reputation.
All companies tech sheets say DO NOT BLEND the clear and you will VOID THE WARRANTY if you do. YES, they do know exactly what they are talking about.