preparing panel edges for painting

[islandjj]

I'm about to put the gloss coat on. I'm preparing panel/door edges for painting, To get a smooth edge I find I'm blocking right through the primer to bare metal, is this normal ? or has anyone got any techniques to avoid this.

 

[norsa]

if its a clean edge, just a quick rub with a grey scotchbrite will suffice.

 

[steveo3002]

you dont really want to sand that far , maybe a sign it needs more primer or better prep?

anyway if you feel its now ready for paint then mist a coat of etch over the metal before you paint it

 

[RaceDiagnostics]

I've been using a minimum of 2 coats of epoxy and 3 x high build to avoid cut through and use a soft grit sponge on the edges.

 

[langy]

I've been using a minimum of 2 coats of epoxy and 3 x high build to avoid cut through and use a soft grit sponge on the edges.

And your going through to bare steel, what you flatting with a file ?

 

[islandjj]

might just try using a very fine grit maybe 800 or above or even scotch bright

 

[the snooper]

might just try using a very fine grit maybe 800 or above or even scotch bright

before you put the gloss on, what grade of paper are you using ?, too coarse and you are going to see the marks in the paint

 

[islandjj]

260 followed by 600 wet and dry

 

[the snooper]

260 followed by 600 wet and dry

that will probably be ok direct gloss but I would go 800 if base and clear

 

[langy]

260 followed by 600 wet and dry

260 is why your going through I reckon, I use 600 for straight color or 800 for COB

 

[langy]

that will probably be ok direct gloss but I would go 800 if base and clear

Personally I wouldn't be going near an edge with 260 !!! In fact I've not even seen 260 grit, it's usually 240 and then 320 ???

 

[islandjj]

Oops probably why I'm going to bare metal !!!! ( Just looked its P240 ) so 240 will show through the gloss ?

 

[steveo3002]

yeah its a bit too rough mate

 

[the snooper]

Personally I wouldn't be going near an edge with 260 !!! In fact I've not even seen 260 grit, it's usually 240 and then 320 ???

ahh yeah I was referring to the 600 & 800 I had completely forgotten about the 260 well spotted

 

[langy]

Oops probably why I'm going to bare metal !!!! ( Just looked its P240 ) so 240 will show through the gloss ?

Without a doubt mate, for straight colout last grit is 600, last grit for COB is 800, don't be tempted to use 1200 either as it might lose the tooth.

 

[islandjj]

Thanks guys, so a bit more work, and primer to do before the gloss, its tempting to cut corners ( no pun intended ), I didn't realise the grade was so critical, but its got to be right after all this work !

 

[langy]

Thanks guys, so a bit more work, and primer to do before the gloss, its tempting to cut corners ( no pun intended ), I didn't realise the grade was so critical, but its got to be right after all this work !

You could tape the edges off and then flat your primer then tickle as needed

 

[islandjj]

Thanks, I'll try that, sounds like a good tip.

 

[DanielW]

Nobody will see the edgework so just spray them and don't touch em with any abrasive,the build up of layers will look smooth and fine when finished.

Trying to sand em down always reveals the bottom layers and as you have found....too much and you reach the metal.

 

[norsa]

Nobody will see the edgework so just spray them and don't touch em with any abrasive,the build up of layers will look smooth and fine when finished.

they'll soon see it when the paint starts to peel as its had no key.