High Build Primer vs Filler primer

[superfly]

Hi Guys,

I have a couple of primer in spray can at home, as far as I can tell they are all Filler primer except maybe one which is named "Hi-Primer" so maybe it is High Build primer.

And I am wondering the difference between those.

I am also wondering the difference between Acid etch primer and etch primer?

I have to paint some bear metal over the week, a battery tray and I would like to do it right.

I will paint use cellulose for the top coat.

Cheers

 

[paintpot]

Acid Etch primer contains a chemical similar to Sulphuric Acid which burns into the Aluminium to provide an excellent bond. Phosphoric is a milder form of Acid more commonly found in rust treating neutralizers. as for your high build primer and your filler primer ,Probably to different aerosol cans ,same thing different name.

 

[superfly]

Hi Paintpot,
Thanks for the explanation.

Are all etch primer contain ACID ? Basically I am trying to understand why UPOL Acid etch is 2.5 more expensive than the other etch primer.

Is it better quality or just a brand effect ?

Could I simply wipe the metal with phosphoric acid before use a standard etch?

Cheers

 

[paintpot]

. Phosphoric Acid: Corrosive! May cause redness, pain,SEVERE skin burns stick toUPOL Acid etch .You can clean down with normal thinners

 

[superfly]

Ok thanks a million Paintpot.

I bought the normal etch primer, so it will have to do for this repair.
I will know for next time. :-)

Cheers