Just fun learning about this coronavirus 2019, there is so much to know in virology and microbiology that it is truly humbling to find out that it is difficult to understand the makings even of the simplest of virions. 4 major proteins, and lots of tricks in the other 16+ which are a little harder to grasp... 

Peplomers (as they are called, also spike poteins) are the nuts and bolts of attachment and entry into the host cell are all around the outside, usually not in cute colors.