restoratıon is a meticulous work.
restoratıon is a fastidious work .
Are this sentences are synonyms?
Both share the meaning of great attention to detail but fastidious is rarely used in that sense - it's usually used with the meaning of paying great attention to cleanliness "the cat cleaned himself fastidiously"
Meticulous is a positive attribute, being fastidious, usually, is not.
"Meticulous" means being very careful, very attentive to detail. Being "fastidious" generally refers to being very fussy about hygiene, cleanliness.