Trunk Lid Sandblasted

[55 Fargo]

Hi all, just had my spare trunk lid sanblasted, it turned out great and was only $30.00 at the local Headstone maker.

I have to repair the rust yet in the bottom lip, but I am going to prime it with my favorite rust primer first.

Now this ? is for Tim Adams, should I sand it first before shooting on the Tremclad, it is super clean metal now, with the exception of the inner bottom lip, whichj is a bit of swiss cheese now.

I want to primer it ASAP, as it is extremely humid here these days...............Fred ps sure beats a bunch of time trying to sand all the paint and rust off, and it is not warped in the least, so $30.00 is sure worth it, going to have my rear fenders done there also.

[Plymouthy Adams]

any freshly blasted metal should be washed with phosphoric acid to kill any small residue in the pits..after that..rinse good...force dry..wipe with a rag dampened with the acid..just enough film to prevent/kill the rust flash...let dry..when dry and slight whitish residue shows..scuff with 3M pad..prime to your hearts content

[55 Fargo]

any freshly blasted metal should be washed with phosphoric acid to kill any small residue in the pits..after that..rinse good...force dry..wipe with a rag dampened with the acid..just enough film to prevent/kill the rust flash...let dry..when dry and slight whitish residue shows..scuff with 3M pad..prime to your hearts content

Hi Tim, thanx for the reply.

I am using Sems Rustmort, so brush or spray bottle it on, then, rinse the whole panel after the alotted time for the Rustmort to work, then use a rag just dampened with the acid, wipe quickly then prime, Correct?

Rustmort is supposed to stay on 24 hours, but I don't think clean sandblasted metal will need it to sit on that long, any idea how long the acid should sit on, before rinsing?

Thanx Fred

[Plymouthy Adams]

I usually wash with the acid, I use a stainelss wire brush on pitted areas and wet and dry paper/3M scuffy on smoother surface..when it can be worked without sign of rust color in the acid..the job is complete...at no time let the acid dry in place till finished..if you run out of time, wash the bulk acid off..damp wipe to prevent flash..continue another time...I do not buy name brand acid products..I mix to my own strength based on surface condition from bulk 85% acid...I cannot comment on the use and prescribed method of their product.

[Jeff.P_46]

Rustmort is a conversion coating for converting surface rust and is not recommended for sandblasted or clean/nonrusted surfaces. It will leave a film on the metal surfaces that paint will have a hard time sticking to. Been-there-done-that

Jeff

[55 Fargo]

Thanx Jeff, Rust Mort really is designed for heavily rusted metal and not clean sandblasted metal, or any metal that is mostly derusted..........Fred