City Bike Build, applying the primer.

Well since I'm working outdoors and the Montreal weather hasn't been the warmest lately, shooting paint has been put on hold until yesterday. I managed to lay the primer on between 2 gusts of wind and still got some over-spray in my glasses.

I found a place to hang the frame and as you can see from the images, it wasn't a pretty place! My number one concern was not to get any paint fly off on the finish of my car or the neighbor's house while still being able to have good access to the frame for the paint application.

Not a pretty paint booth but it works.

Since the surface to prime was already sanded and clean, see previous post, I was ready to shoot. The first thing you apply the paint to is underneath the frame and all those hard to get places. The top and sides always get ample coverage, it's always the bottom and those little nooks and crannies that get ignored in the process. So good coverage there when you start is a pretty good guaranty that you won't miss anything.

Start priming underneath and in those hard to reach places first.

Next you shoot the rest of the frame and make sure you have covered the entire frame. In this case it's pretty easy for me since I'm using a black Krylon Rust Tough primer on a red surface. Missed areas pop out pretty quick. Lay the paint in many thin coats, this will greatly reduce any drips. If you have drips that show up on your paint job, you're pretty much screwed at this point. Don't add more paint to the area, this will make it worst. Wait for the entire frame to dry, sand the spot in question and re-shoot the spot.

Frame fully covered in primer.

Talking about drying, you should wait at least 24 hours before shooting over with the finishing coats on the primer. Spray paint works this way, the color pigments are carried to the surface with thinners and you also have some propellant gases in the mixture to get all this stuff out of the can. It takes some time for all those chemicals to evaporate from the surface. Adding more to the mix by shooting another coat of paint over this doesn't help matters.

Direct sunlight will help the drying process and make any mistake pop out like Pee Wee Herman at a Board meeting!

One of the best ways to dry paint and stabilize this chemical cocktail is to expose your work in the Sun. I was lucky yesterday with bright sunshine and I was able to hang the frame in the sunlight for the afternoon. Despite this, I can still smell the evaporating thinners from the paint job this morning in my shop. I'll probaly wait another 24 hours to shoot the finish coat. Direct sunlight also has the advantage of making any spot you missed pop out instantly. It's nature's way of slapping you with a "You missed a spot".

Parts gathered so far.

I've started gathering some parts from my parts bin and other bikes that I have that are on ice for the time being. I hope to keep cost down by using what I have.

That's it for now.

Don't forget to check out the how-to articles. 

Until next time, ride safe and free.

Gerry :)

City Bike Build, prepping the frame for paint

Now that all those funky stickers have been removed, it's time to prep the frame for paint. The one thing that is of the utmost importance for making a great looking paint job is proper surface preparation. The time you spend here will save you an enormous amount of time later for fixing mistakes or even worst, starting all over again.

A well prepared surface is the key to any, and I do mean any, paint job. The first thing we need to do is to clean the frame in order to have a clean surface before doing anything else. I removed the left over glue from the old stickers with lighter fluid. You can use other products as well like WD40 or other goop removers. I hope that if you do use lighter fluid, you have at least half a brain to do this outside or else...BOOM!

Removing left over glue.

Next we need to clean the surface. After making sure that all the glue was gone, I went over the frame once with mild dish soap and rinsed it. I then went over the entire frame again with paper towels in order to dry it.

Washing the frame down.

Now that the frame is clean and degreased, it's time to sand. Some of you might think that in order to do a proper job it means to sand this sucker down to the bare metal. If you plan to have the frame powder coated or painted by a professional, it's not a bad idea. If, like me, you're planning a straight spray can job, I don't recommend it. No amount of spray cans can equal the toughness of the original finish when it comes to protecting the frame from corrosion and dings.

Exposed metals dings smoothed out with rough sand paper.

So what I am doing is going over the exposed metal areas with a rough sand paper in order to smooth it out with the surrounding finish. While doing this, I try to keep as much of the original finish as I can. After taking care of all those rough spots, I went over the rest of the frame with a fine sandpaper in order to give grip to the first coat of primer. Again, I do this while trying to keep as much of the original paint job as I can. A good way to know if you've done enough is to remove the shine out of the finish. Don't freak out if you see metal coming through fast, some bikes have very poor and thin paint originally.

Entire frame done with a fine grit sand paper. Original shine of the finish is gone.

After this was all done, I wiped the frame down with a tacky cloth to remove all the dust. I also sprayed all the exposed bare metal spots with primer in order to prevent rust until I have time to work on it again. Exposed metal can rust pretty fast especially when exposed to any kind of moisture. I use Krylon's Rust Tough since it reacts with rust and this will inhibit any that I have missed in the sanding process. Those spots of paint will also tell you if your surface is clean for more spraying later on. If there was any problem with the surface, you would see bad reactions like fish eye or orange peel on your new coat of primer. If this happens, strip it, clean it and start over.

Ready for primer.

That's it for now, next step: Primer and paint.

Don't forget to check out the how-to articles. 

Until next time, ride safe and free.

Gerry :)