Originally Posted by JohnB
Now any ideas on how to preserve it? Steve Collins was talking about the varnish. Steve what brand etc would that be?
I have a can of Krylon UV-Resistant Clear Acrylic Coating sitting on my desk. I bought it because I have to re-do our Sunline camp sign as our address changed.
I was unhappy with the yellowing of the marine spar varnish that I used on the first version of the sign. It was pretty yellowed when you saw it last year and has gotten worse.
The Krylon is available in matte and gloss finishes. I think it may be the way to go on irregular surfaces like aluminum siding on our TT's. If it was me applying it, I'd get a 1/2" or so coverage on the siding itself all around the sign, and apply at least 3 coats on the whole sign, and perhaps several extra coats around the edges.
There is also a wet method of applying large vinyl signs that allows re-positioning until you have it just right. Short version: lightly soapy water (Ivory Snow is real good for this) applied to whole area. Strip both backings off the sign and place it where you want it. While it's still really wet, you should be able to slide the sign around and get it exactly where you want it. The pro sign guys use a 4" soft rubber brayer (Brayer - Wikipedia, the free encyclopedia
) to work out the water from under the sign starting at the center and rolling to the edges in all directions. The soft plastic putty knife that John used is good for this, too, but the brayer is probably safer to use on silk screened surfaces.
One trick you can do with sign application: To make sure you have the sign where you really want it, temporarily place it with masking tape or something, and then walk away and look at it from a distance. Your eyes will tell you if it is right. Another reason for the wet application method.
The sign guy who taught me this also said that if you end up with an air bubble, not to worry. If you are going to clear coat the sign, use a pin to pop it and work it down with your fingers. If you dry apply the sign, the air bubbles can even be left if they are very small and they will go away. If you wet apply, you have to pop them to get the water out. But with wet application, it is very easy to move the bubbles across the sign with the brayer, so ending up with any bubbles is unlikely.