I usually fill them with expanding foam, although I won't have time with this one. I may do it when it comes back off to get the crack welded.
This is it with the first coat of paint
I really hate painting subframes! Its not difficult, just messy and so time consuming. Plus why do I only seem to do them in the winter? This is in my office with the heater on so the paint works. If I could find someone to do this job for me I would gladly farm it out, but it will barely fit in my local powdercoater's oven. Plus, powder means the bushes have to come out which adds considerable cost, in some cases unnecessarily.
Second coat today, then a day to dry so probably back on the car on Monday. Front lower control arms today.