Anyone have any tips to make my Thousand Sons Rhino to look more like it's erupting with tumorous growth?

Looking at it, I feel like it kinda looks like I just slapped on random bits and milliput. I did, but I want it to look more purposeful/part of the piece.

I watched Midwinter Mini’s video for the nurgle land raider and used much of that for inspo. I really wanted the PVA+Superglue trick to work but it did not come out as nice for me. I thought about adding more and just not painting it, but a bit worried about slapping that on miiiight be too much?

If anyone has any advice to make it look more like a flesh change or parts erupting from the metal (or any other advice to elevate this) I would greatly appreciate the guidance.