help engine numbers

[baz-r]

im in a bit of a pickle again got me motor back in the back of the estate and droped it into the garage last night
went to clean up the engine no (its a 1.8 silvertop zetec) and i can get the engine type code RDB=1.8/105bhp and the first two letters PP (year)= april 93? of the engine code but little rust monsters have made the rest unreadable or
what do i do?

any ideas on tricks to either to make it easy to read the orignal or date of the casting no.s
i have already cleaned off the top/flat bit with a bit of wetand dry on a small flat block to hopfuly leave the rust in the imprint of the rust but its pitted and i dont want to take it all off leaving it plain flat
thort i maybe able to get it from the orignal cars reg from ford IF i can get it off the seller