REFLECTOR: How smooth for Smooth Prime?

[Terry Miles]

Doug,

Ditto Keith's remarks.  Also any paint plan is best considered as a complete
systems of coatings that work all with each other.  Before you go any
further I would encourage you to decide the whole enchinlada and then seek
the advice of whatever paint manufacturer you are going with regards
undercoatings and grit issues.  Also-that said-- be aware that every company
blows a little smoke about why you need to use their products for all the
coatings that you need.  I don't know anything about "smooth prime."  But
have a plan after that is my point.  

Terry

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Keith Hallsten
Sent: Thursday, June 28, 2007 8:08 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: How smooth for Smooth Prime?

 

Smooth Prime is really a surface filler, not a true primer.  It goes on as
rough as a cob with a roller (3 to 6 coats), and must be sanded before the
"real" primer is applied.  Thus, there is little benefit to getting the
surface excessively smooth before applying Smooth Prime.  Excess smoothness
can actually cause adhesion problems.  I wouldn't go any finer than 150 grit
before applying Smooth Prime, then no finer than 320 or 280 grit before
applying the primer recommended for your top coat.

 

Keith Hallsten 

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Douglas Holub
Sent: Thursday, June 28, 2007 1:46 PM
To: reflector at tvbf.org
Subject: REFLECTOR: How smooth for Smooth Prime?

 

To which grit should we sand before we prime? 150?  220?

 

Doug Holub

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