Originally Posted by
Bikedued
The solvents are to remove adhesives from vinyl decals, and ANY trace of grease hiding on the frame which could ruin the new finish being applied. Believe me, they most likely will not even think of doing either. Sandblasting just moves grease and adhesive goo around, but will not completely remove it.,,,,BD
Solvents cannot remove hydrocarbons from the surface completely. A monolayer will always remain behind and prevent true bonding of the powder to the metal. To get rid of the monolayer and get an activated surface (high surface energy), you have three possibilities:
1) (sand)blasting. Beware of thin or soft materials.
2) heating to 250-300C
3) scrubbing with oxidizing cleaning agents (e.g. Ajax)