timgray Posted January 5, 2009 Share #1 Posted January 5, 2009 The pin-striping that Yamaha installed 25 years ago... well it's glue penetrated the plastic and causes major issues when I sprayed a primer coat to smooth a bit better. I had to switch to a non reactive nasty cynocryalate based sealer to bury the mess that the pinstripes made in the plastic to make it go away. The problem happened on every location on the bike where there was a pinstripe. IF you leave the pinstripes there and are fine with a bump under your new paint this will not be an issue, but I wanted it right so I razored off all pinstripes, sanded everything smooth and started the painting. ugly crinkles appeared, reappeared, reappeared until I found something that would not react and bury it. now the parts are as smooth as glass and ready for paint. Oh another note: most of the emblems on the bike are there to hide major ugly casting marks when the bike parts were made. if you want everything smooth, you have to use flexible plastic filler to fill them and make them disappear. Link to comment Share on other sites More sharing options...
MikeM8560 Posted January 5, 2009 Share #2 Posted January 5, 2009 the clearcoat over my pinstripes is cracking a bit, not bad yet to need new paint. I do have some small cracks in the suspect areas of the trunk and side panels they dont show unless your real close, I was sondering if there was a way to repair then and not need paint other then just supporting them from the backside, like has anyone found a way to fill the crack and not expand it? BTW were going to need pics of the new paint , in progress qwould be cool too Link to comment Share on other sites More sharing options...
Dragonslayer Posted January 5, 2009 Share #3 Posted January 5, 2009 the clearcoat over my pinstripes is cracking a bit, not bad yet to need new paint. I do have some small cracks in the suspect areas of the trunk and side panels they dont show unless your real close, I was sondering if there was a way to repair then and not need paint other then just supporting them from the backside, like has anyone found a way to fill the crack and not expand it? BTW were going to need pics of the new paint , in progress qwould be cool too fill with superglue Link to comment Share on other sites More sharing options...
Guest mtruitt_1971 Posted January 7, 2009 Share #4 Posted January 7, 2009 try using fibergalss resin to fill the cracks or using some sort of marine epoxy to fill cracks, water proof and sandable and takes paint easily haven't tried it yet but will let you know as soon as i do Link to comment Share on other sites More sharing options...
SilvrT Posted January 7, 2009 Share #5 Posted January 7, 2009 When I redid my '87, I did not experience this problem...probably because I sanded right thru the original paint where the pinstriping was before I primered. I had to primer and sand at least 3 times before topcoating. I used a good automotive quality primer/surfacer and used 180 sandpaper on the first primer coat, then re-primered and used 220, then re-primered and used 320 sandpaper prior to a final coat followed by wet-sanding with 600 before the color. Link to comment Share on other sites More sharing options...
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