Sunburn?

sun burn or it came into contact with cleaner

It is in my indoor greenhouse under lights. I cut it way back, repotted it, and treated it with Neem Oil. I may just have to pitch it. I wondered if it was scale, but I haven't found any bugs and nothing scrapes off of it. I did have it in a west window a while back, so maybe it was sunburn. Sadly, it's one of the hoyas I always wanted and came from Thailand few years ago. Thanks for your help.

hopefully you wont have to get rid of it