Fred,
I am going over the emails I received in advance and the following
is your reply to some of my stupid questions.
If I didn't say so, I do now - thanks for having taken the trouble
to reply in such detail. It's much appreciated as I begin the season's
mutterings over the finish I hope for. Still lots to do, but enjoy the help!
Thanks again,
Ferg
----- Original Message -----
From: "Fred Fillinger" <n3eu@comcast.net>
Subject: Re: Europa-List: Re:Paint opinion
|
| Fergus Kyle wrote:
|
| > I appreciate your advice in this topic, but am having
| trouble
| > with sentence structure..... may I infer that the two methods of
| adhesion in
| > the products under consideration are (a) Tooth adhesion and (b)
| Chemical
| > adhesion?
|
| All I meant was there will always be tooth adhesion, but two-part
| epoxy primers are generally impervious to paint solvents. You can
| test anything with the thinner to be used in the primer or topocoat,
| if applied directly. How you can test adhesion of anything to a
| waterborne coating like Smooth Prime, I dunno; is a test shoot that
| lasts a year OK?
|
| I did a sand-and-paint down to a solvent 2-part epoxy primer that was
| only a couple years old, and then Imron topcoat. Still good after 19
| years in the sun. But another time I used the same primer and shot
| another poly, but the next day. Now the primer mfr said if you do
| that, abrade it with Kraft paper. Huh? Well, I figured do what they
| say, so I bought actual Kraft paper and sort of abraded it, I guess.
| The topcoat mfr doesn't say it's OK to use this primer either, but
| that poly is still good today.
|
| I didn't find out until recently that this primer I still use on metal
| stuff (re adhesion) needs days of cure before you can wet sand it,
| though it's no longer tacky overnight. If you wet-sand it too soon,
| it balls up in the paper; it may be the phenomenon where epoxy can
| draw in water by osmosis not absorption. Dry Kraft paper must break
| the surface tension if still soft enough, which is the minimum
| required for topcoating.
|
| I've also never had trouble with any poly or acrylic, over common
| spray-can primer on small plastic fairings. No sense to me in mixing
| gun-clogging epoxy for small parts which don't need the advantages of
| that paint.
|
| > I plan on leaving the spray work to a professional
| (commercial)
| > painter .......and how do I voice my question to the provider?
|
| I recall a sign posted in an auto repair shop, "Watching -
| Free....Questions - $10....Suggestions - Forbidden."
|
| Reg,
| Fred F.
|