Have a question about sanding on glass to remove glue?

[stick flipper]

I built my first bow and had masking tape on the glass but still ended up with glue on it. I sanded the glue the best I could to get rid of it. I used 220 and 320 grit. Now what is the best was to get the glass to look good and shine again before I put a thunderbird epoxy finish on it? Is there hope or will it look like it has been sanded on no matter what I do? I was told to use some steel wool. Is that my best option?

Thanks, Chris

[Bradford]

I have been building bows all  month.. same problem.  Once I finish sand with 320, I just use the clear coat and it all goes away.  If you really want to take care of before the clear, keep moving up the sanding chart.. 400grit, 1000grit.. etc.  Like you are polishing.

But if you get your finger wet and wipe it on the bad spot and the bad goes away, the poly will do the same thing to it.  That is how I test to see if I sanded enough!

Good luck

[Trux Turning]

As long as there are no deep sanding marks on the glass- the sanding marks you see now will all goes away when you put the finish on. You can do like Bradford said and wet the glass- it will show you what it is going to look like. Wipe it down- I'll bet you sanded enough for the finish.

[stick flipper]

thank you!

[rbbhunt]

I've had some luck using a razor blade to scrape off glue on the fiberglass before sanding.

[Mike Most]

I usually sand all the limbs with 120, 150, 220,320 and 400 grit paper, it takes the shine off so finish will adhere, in the process all the glue that got in the wrong place goes away.  

[ChristopherO]

I presand the fiberglass lams before taping and glue as a standard to keep it from looking like a plastic bow when finished.  The factory shine just is too smooth and glossy, IMHO.  I got this idea from a build along some time back.  Probably Sam Harper's website.  When the poly is applied it looks very good.

[Dave Worden]

Everything above is good stuff.  I'd just like to stress that scraping is a better bet for removing glue than sanding.  You can control the scraping better (to just hit the glue).  When sanding, you'll often sand the adjoining areas lower than the area that had glue on it 'cause that glass is getting sanded from the git-go while the glass under the glue only get once or twice as you finsih up.