Painting Question

[PiNPOiNT]

Ok here's the situation

I've been painting my cabinet for a few days now, sanding between coats, but on one of the coats, i really noticed some areas where there was some wood putty that wasnt smooth underneath, so i sanded those areas basically back down to the wood, but now as i keep painting over those wood areas, its really showing through the paint.  

Should i either keep painting coats over it untill its gone?
or is it safe to put primer back ontop of the area even though some of it has some paint on it now. then continue with the normal paint again.?

[MameMe]

I have the same problem.  I didn't sand between coats though.

The areas where wood filler was sanded down are "bumpy" & "whiteish" in color.  It shows through 2 coats of primer, & 2 coats of paint.

I'd like to know what to do as well.

[PiNPOiNT]

I've been thinking more about the situation, and if it was a wall that you were painting in a house, then you would normally just prime over the entire thing and start with the new colour that you want.  so if we were to prime over the whole thing again and move on, all we would have wasted is the several coats that we've put on everywhere else, (back to square one).

I'm wondering if we were just to prime the areas that are sanded down to the wood, and start painting over that again, would the colours match up eventually again with everything else that is already painted?

[RayB]

I've read in other threads that part of the problem is using the "right" wood putty. You want a putty that will not absorb the paint. (So those little tubes of beige paste just don't cut it).

People have vouched for Bondo (meant for auto body repair). I bought some professional quality spackle, and hopefully that will be suitable.

[Sapper]

This may also be a problem with the type of primer you were using.  In some cases, a particular type of primer is no good for some types of material.  I have heard of some folks wrecking their project made of MDF by using a water-based primer, which can soak into the MDF and cause it to swell.  

Cheers.

[danny_galaga]

i've used acrylic (which is water based) on mdf no probs. and 'bondo', that is polyester body filler is really good especially on counter sunk screws

[PiNPOiNT]

Ok i spoke to a buddy at work who said that its perfect fine to just paint over the bad areas with primer again if the paint isnt covered the dark wood colour well enough

then just continue with the painting again, and the colours should match up after a few more coats

[WTFPWND]

i've used acrylic (which is water based) on mdf no probs. and 'bondo', that is polyester body filler is really good especially on counter sunk screws

Just like to chime in on the bondo discussion.  

I made a big booboo and drilled the 1 1/8" holes for my pinball buttons a tad off (the joystick switches were hitting on the left side)

Anyhoo, filled it with bondo, sanded it down, put 1 coat of black latex paint on, and you cant see a thing!

[Sylentwulf]

A helpful note for painting dark colors that noone ever seems to do.
Have your primer TINTED to at least come CLOSE to matching your paint. You can have home depot tint the primer, or you can just add some of your paint into the primer and mix it so it's at least SOMEWHAT darker.

Nothing worse than using white primer to paint something black.