Yes, but you’ll prob get more movement if you do the heating at the seat tube end. Doesn’t hurt to start from the HT end. Do you have a BB post you can fasten the frame on some surface? you cannot heat straighten unless the frame is supported against moving to the opposite direction.
You’ve prob seen my previous posts on the subject: 1 & 2
You can easily start with a straight piece of MDF or similar, you only need the table for references. Just turn a BB post on on a lathe or get someone do it for you.
My lowtech approach:
I fixed it?