How to prime P/E parts for better paint adhesion?

[Richard502]

in this case it's Tamiya's P/E set for their 1/48 Swordfish. I doubt the paint (Xtraclor enamel) will adhere perfectly to the shiny steel.

[Jamie @ Sovereign Hobbies]

You'd need an etch primer to make a meaningful difference here. It is available as an aerosol can, but you must be careful a) because the stuff is quite evil to health (definitely a mask + out doors job) and b) because aerosols have very poor control and you could easily apply a very thick coat to the P/E metal parts.

[dnl42]

I use Mr.Metal Primer. It's clear and can be brushed on neat. You can also apparently airbrush it thinned 1:1 with Mr.Levelling Thinner. 

[Ray_W]

VMS also make a product. I have not tried it myself. https://www.vms-supplies.com/vms-metal-prep-primer may be worth checking out.