Hello everyone, I have a problem I was hoping someone could shed some light on.
I’m using a roller to apply a varnish to a test-piece of pine, before using it on a real piece of walnut.
I’ve never used a roller before, only a spray, and I have very little experience with finishing in general.
I should note that I don’t know if i’m using lacquer or varnish, as my first language doesn’t have that distinction, but the substance is originally made for boats, if that gives you a clue.
Here is my problem: Between layers of varnish, I sand the peice with grit 240 sandpaper, using a cork sanding block.
But the sandpaper draws visible lines into the lacquer, and to in an attempt to remove them, I end up sanding all, or most of the lacquer off! Below is an image that shows the surface of the test peice after sanding the lacquer.
This is my second failed attempt at applying the lacquer to this piece.
Should I sand more carefully? Use a finer grit perhaps?
Anything else?
Replies
sanding marks
Can't tell for sure from your pic, but:
1. Are sanding to the same grit before applying the lacquer/varnish?
2. Are you getting a fine dust when sanding or little rolls? If the latter you are probably using varnish and just not waiting long enough for it to dry properly.
3. You may be getting an uneven coat by using a roller - lots of hills and valleys. You could be taking off the 'hills' and the 'valleys' remain. Since you have spray experience you should try that for a more even coat.
Kudos for trying your finish on a test piece first!
BTW where did you find 240 grit paper?
Forrest
Thank you for your reply forrestb.
1. Same grit before and after, yes.
2. I'm getting "rolls" as you say. The can said to let it dry for a minimum of 12 hours, I'm going to give it at least 24 next time then, thank you.
3. I will see if I can borrow one, or maybe use a brush if that could work?
This prbably wont help you, but 240 grit paper is available in most diy-stores or construction markets where I live (Copenhagen).
Thanks again!
Sigurt
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