At a Maintance day a few years ago,
I had the RADIATOR FLUID tank OUT,,
While it was out,,
I took a 12'' by 9'' piece of Gav.DUCT metal from hardware store,,
I placed the duct metal on the bottom of the fluid resivour,,
and folded the 2'' edges back-up the sides of the tank,,
and then used BAILING wire to tie-it-on,,
Every OTHER year,,when I do the Radiator fluid change,,
The other members of our group,,
get a kick-out-of,, the damage to the metal cover EACH year.
I did NOT want to install a Toal coverage "BELLY PAN"