Spray painting fridge. Primer showing up little lumps - photos included
#1
03-28-13, 07:37 PM
Join Date: Mar 2013
Location: United Kingdom
Posts: 12
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Spray painting fridge. Primer showing up little lumps - photos included
I sanded the fridge doors with medium, and then fine sandpaper. I think the fine one was 150grit. This has worked fine everywhere else on the fridge apart from the doors. I am not sure if they are made of a different type of metal, or maybe not even metal, but when I have sprayed primer on them these little lumps / marks start to show up.
I believe this is a result of the sanding process even though it felt smooth after I had sanded. For some reason the primer wants to gather around whatever imperfections there are on the door.
Anyway, I'm wondering what to do with this now. What grit sandpaper should I use to try and sand them away, and will I need to spray more primer?? I need to find a way to sand and spray my main coat ASAP as I am moving next week and want to spray paint the fridge over the weekend.
I believe this is a result of the sanding process even though it felt smooth after I had sanded. For some reason the primer wants to gather around whatever imperfections there are on the door.
Anyway, I'm wondering what to do with this now. What grit sandpaper should I use to try and sand them away, and will I need to spray more primer?? I need to find a way to sand and spray my main coat ASAP as I am moving next week and want to spray paint the fridge over the weekend.
#2
03-28-13, 07:45 PM
Group Moderator
Welcome to the forums from the UK.
Are you using a lacquer based primer ?
You primer may be eating the paint on the fridge.
Are you using a lacquer based primer ?
You primer may be eating the paint on the fridge.
#3
03-28-13, 08:14 PM
Group Moderator
My guess is that it's dust getting in the finish from a static electric charge, which is perhaps greater on the doors due to the gasket that separates it from the rest of the refrigerator body. Wipe the door with a cloth that is damp with paint thinner (assuming your paint is oil based) before spraying to make sure it's clean. Try not to buff it with a dry cloth as that will "recharge" the door, making the surface attract any nearby particles that are stirred up by the spraying.
I don't believe you need more primer, unless you sand the door again and the door still feels rough. If the "pebbles" have left texture in the finish, you might need to reprime and sand again, to try and smooth that finish. A 1/4" nap mohair roller might be needed to give even coverage.
I don't believe you need more primer, unless you sand the door again and the door still feels rough. If the "pebbles" have left texture in the finish, you might need to reprime and sand again, to try and smooth that finish. A 1/4" nap mohair roller might be needed to give even coverage.
#5
03-29-13, 09:15 AM
Join Date: Mar 2013
Location: United Kingdom
Posts: 12
Upvotes: 0
Received 0 Upvotes
on
0 Posts
I'm using Plasti Kote metal primer. I don't know if it is lacquer based or oil based?? I looked it up on Google, and interestingly one of the sites selling it describes it as a "non-sanding based primer".
I don't know how dust could have got on it. I wiped the entire fridge with a tack cloth before spraying the primer. The marks seem to show up where I had sanded the door. I should probably have gone for a finer sandpaper before spraying the primer.
Anyway, thanks for the welcome and replies. If I can find out if this primer is oil based I might wipe it with a cloth that has white spirits on. However, the alternative would be to use the finest sandpaper possible. I'm seriously concerned about sanding and reducing the amount of primer on the doors or having to spray more primer. I want to get this blue spraypaint on tomorrow.
I don't know how dust could have got on it. I wiped the entire fridge with a tack cloth before spraying the primer. The marks seem to show up where I had sanded the door. I should probably have gone for a finer sandpaper before spraying the primer.
Anyway, thanks for the welcome and replies. If I can find out if this primer is oil based I might wipe it with a cloth that has white spirits on. However, the alternative would be to use the finest sandpaper possible. I'm seriously concerned about sanding and reducing the amount of primer on the doors or having to spray more primer. I want to get this blue spraypaint on tomorrow.
#6
03-29-13, 09:42 AM
Sometimes you can get a 'dust fog' with the overspray or it could have been some air borne dust, anyway you need to sand it smooth. I wouldn't think anything finer than 220 grit would be needed. I doubt you'll need to reprime ..... unless you sand down to raw metal.
Last edited by marksr; 03-30-13 at 05:51 AM. Reason: last sentence didn't make sense
#7
03-29-13, 08:07 PM
Join Date: Mar 2013
Location: United Kingdom
Posts: 12
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Dust fog sounds about right. It only happened on that section of the fridge so I think you're right there. 240 grit wet n dry paper seems to remove the lumps just fine without disturbing the primer. Thanks for the advice.
