Author Topic: Blocking coat (Read 904 times)

James Mills · « **on:** February 28, 2008, 09:48:47 PM »

I've seen this mentioned in other finishing threads, what exactly is a blocking coat? Is it synonymous with the primer coat or is it something else?

Thanks,

James

Bill Little · « **Reply #1 on:** February 28, 2008, 09:52:22 PM »

Quote from: James Mills on February 28, 2008, 09:48:47 PM

I've seen this mentioned in other finishing threads, what exactly is a blocking coat? Is it synonymous with the primer coat or is it something else?

Thanks,

James

It is a rough color coat, either silver, (or my favorite a very light gray) used to cover all the variations in finish before you spray your final color coats. Makes coverage easier and helps to point out last minute flaws.

Windy uses the silver as a blocking coat and fine primer (or at least he use to!) after his filling is finished since one you sand it, ANY flaw will pop out at you!

Paul Smith · « **Reply #2 on:** February 29, 2008, 11:48:38 AM »

If you read the fine print on Randolph paint (source of Brodak).

"Yellow and red colours are transparent. They must ONLY be used over WHITE".

Bill Little · « **Reply #3 on:** February 29, 2008, 12:35:12 PM »

Quote from: ama21835 on February 29, 2008, 11:48:38 AM

If you read the fine print on Randolph paint (source of Brodak).

"Yellow and red colours are transparent. They must ONLY be used over WHITE".

That is very true. Windy use to sell yellow and white pigment to add to those color dope.

I like to add just a touch of gray or black to make the blocking coat a slightly off white which covers easier.

James Mills · « **Reply #4 on:** February 29, 2008, 09:55:54 PM »

Quote from: ama21835 on February 29, 2008, 11:48:38 AM

If you read the fine print on Randolph paint (source of Brodak).

"Yellow and red colours are transparent. They must ONLY be used over WHITE".

Do you try for "complete" coverage with the white before yellow (this might explain part of the problem I had on my Hallmark)?

James

Will Hinton · « **Reply #5 on:** March 01, 2008, 03:39:43 PM »

I'm afraid I have to differ with the "yellow only over white" concept. It depends on the type of yellow being used. I just finished the painting on my new twin boom Ephesian with yellow over powder blue primer to give me the tint I wanted and it is a great yellow colorwith a slight green tine. In the sun it will change color from under cloudy conditions. By varying the under coat color you can really play around with different results of tints, quite similar to whether to use gold or silver under a candy apple finish. That's the fun of painting, using all the variables to experiment! and yes, yellow is translucient, as is red, and, "gasp", even some blacks.
Will

Bill Little · « **Reply #6 on:** March 01, 2008, 05:40:45 PM »

Quote from: Will Hinton on March 01, 2008, 03:39:43 PM

I'm afraid I have to differ with the "yellow only over white" concept. It depends on the type of yellow being used. I just finished the painting on my new twin boom Ephesian with yellow over powder blue primer to give me the tint I wanted and it is a great yellow colorwith a slight green tine. In the sun it will change color from under cloudy conditions. By varying the under coat color you can really play around with different results of tints, quite similar to whether to use gold or silver under a candy apple finish. That's the fun of painting, using all the variables to experiment! and yes, yellow is translucient, as is red, and, "gasp", even some blacks.
Will

When it comes to dope, it seems they are ALL translucent to some degree....

Will Hinton · « **Reply #7 on:** March 02, 2008, 10:49:10 AM »

That's true, and that's also why I no longer use dope for color. I've seen too many dope jobs of my buddy's turn "strange" after curing! I'll mention no suppliers, but it can happen to many of them I suppose.
The development of affordable two-part clear has freed us to use many sources of color and I love it.
Blessin's
Will

Author Topic: Blocking coat (Read 904 times)

James Mills

Blocking coat

Bill Little

Re: Blocking coat

Paul Smith

Re: Blocking coat

Bill Little

Re: Blocking coat

James Mills

Re: Blocking coat

Will Hinton

Re: Blocking coat

Bill Little

Re: Blocking coat

Will Hinton

Re: Blocking coat