Seymour AMC Blue on raw Aluminum, do you prime?

[rang-a-stang]

Picked up a used Edelbrock intake and am going to sand blast it today. I plan to paint it AMC blue using Seymour's EN-66 Hi-Tech Engine Spray Paint. I ordered the spray can from Amazon today (it gets here Sunday) but can't find the manufacturers instructions online for the paint.

Does this paint require a primer over raw aluminum? If so, what are your recommendations?

[440sixpack]

Good question. most people will say a good DP primer or self etching primer should be used under the top coat. I haven't seen the need.

I have found DP primers stick great but they make the paint so thick it chips easy and looks crumby. if you touch a bolt with a wrench or bump it a big chunk flakes off.

For what it's worth the factory didn't prime steel or aluminum on engines. I don't anymore either I just clean it real good with 203 and shoot it. the engine in my '70 Challenger was painted this way 15 years ago and still looks great.

[joe]

I would look up Semours web page. They should have a contact phone email and street addy. Call their tech dept. Intakes are pain to R&R so I'd want get it right the first time. In the marine workboat industry for alum bits above the waterline or in the eng room we always used a zinc chromate primer for an enamel top coat.

[yossarian19]

I've been told that anything aluminum requires primer OR annodization before paint will hold worth a darn. I don't remember who / what exactly but I think I heard it from one of my industrial robotics teachers

[newtojeeps]

I think the sand blasting will give enough tooth for the paint to stick

[rang-a-stang]

Can showed up today and makes no mention of primer. It says
"Surface must be clean, dry, and free of rust before painting."
I sprayed my manifold and it looks GREAT! I'll try to get a pic later but am stoked on the finish, stoked on the color, and excited to get it on.... in like 6 months.

[Heavy_Metal_Thunder_81]

[rang-a-stang]

Ok, here it is. I don't have a before picture becuase i didnt have high hopes for a good finish. I have not chase my threads anywhere yet. Everything is finger tight or less. You can clearly see I gound off the "Edelbrock Performer" logo.

[Heavy_Metal_Thunder_81]

Nice!
Also that poster in the background looks familiar

[rang-a-stang]

Also that poster in the background looks familiar

That poster has been hung in three garages in the lat 20+ years and was in one of my radar rooms on my last deployment. Anyone that has ever worn a dixie cup should have one hanging in their garage. 'Murica. Hell yeah.