I came across this forum whilst searching for some photos of the Plymouth/Banjul Rally in 2005.
@adrianr
@Cptsideways makes mention of a team member who suffered burns due to a radiator exploding. (Post #10)
I am that person, and can report that thanks to the prompt action that was taken by fellow drivers, I made a complete recovery. The skin on my face went like leather, and it felt like I was wearing a rigid mask. After about 10 days, it just peeled off, revealing pristine new skin underneath. Thankfully, I have no long last effects.