I would disassemble by grinding all those rivets. Jim Carter has an inexpensive kit with screw type fasteners to put it all back together. On my 50 COE, we tried to mask the bars to paint the inner ones white and outer ones body color but that just didn't work. Good Luck,
Kent

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix