Here is the full list of all 63 Car Detailing Simulator achievements.
Wash 500 cars
Make money
Fix ufo
Find turtle
Wash 100 cars
Finish game
See credits
Get 15 rep
Wash 50 cars
Buy auto salon
Car 1 minute
Get 10 rep
Pressure washer time
Stairs ride
Water computer
Buy all upgrades
Find unique
Use automatic polisher
Use paint meter
Wash 10 cars
Use small brush
Use sponge
Buy all toolkits
Get 5 rep
Return dirty
Sell lower price
Fix trash
Use trash can
Buy shed car
Repair garage
Buy garage
Long session
Buy interior toolkit
Use soft brush
Use wide brush
Fix seat
Use sand paper
Buy window toolkit
Buy wheel toolkit
Buy seat toolkit
Buy garage upgrade
Get 2 rep
Fix scratches
Use hand polisher
Use flashlight
Buy finish toolkit
Open memory
Wash 1 car
Buy body toolkit
Take photo
Buy one toolkit
Use seat spray
Finish tutorial
Use vacuum
Use window spray
Use rag
Use pressure washer
Buy lights toolkit
Fix body
Fix windows
Fix wheels
Overtime