If you don’t have access to a bead blasting setup, then just sand all your other pieces until smooth, apply self etching primer, wet sand, then apply color coat. Another option to bead blasting to bare metal is to use a paint stripper. It’s a little messy but you can get down to bare metal that way. Here’s a lower unit where I used Citri-Strip – worked real good.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."