dime bag, hahaha, been a long time. I didn't have any chips or chunks to pull out but there was some rough spots to the touch, namely the driver's side from a few inches past the rear end side of the rear control arm mount to a few inches towards the front of it, I ended up making one of those frame pummelers with a chain on the end of a drill & shoved it in & beat everything to death & got it as smooth as possible, still not perfect, maybe consider doing the same. Shot Eastwood in until it was pouring out of the drain holes, stuff runs like water. I'm extra paranoid about internal frame rust so I've since gone over the entire frame inside with fluid film in case the paint cracks. I think I went a little overboard with it, every now & then I stick a finger in there & the goop feels about 1/16 inch deep
I've given up the mud, rinse, repeat life also, just not worthwhile to me anymore. At this point I think the only element my rig is battling is humidity in the summer, which I imagine can cause slow rot over time to exposed iron. Other than that it's not exposed to rain, snow, salt or water crossings.