Stearated sandpaper and interprotect

[Ian R]

On my can of interprotect under notes I quote " The use of stearated or similar type sand papers is not recommended".
On the can is the only place I can find this mentioned. There is nothing in the yachtpaint guide or download for interprotect that I can see. Only intrerprotect has this note not perfection etc.

Stearated is apparently the no fill type sandpapers. Nobody I asked had any idea what stearated sandpaper was.

If this is a serious concern it should be in the painting guide.

[sww914]

Any sandpaper that you buy at an autobody supply or chandlery will be safe. All of the sandpaper that they sell under 1000 grit will likely be recoated with something and you don't want any slippery additives on the substrate. I agree that it should be in the painting guide.

[minaret]

Originally Posted by Ian R

On my can of interprotect under notes I quote " The use of stearated or similar type sand papers is not recommended".
On the can is the only place I can find this mentioned. There is nothing in the yachtpaint guide or download for interprotect that I can see. Only intrerprotect has this note not perfection etc.

Stearated is apparently the no fill type sandpapers. Nobody I asked had any idea what stearated sandpaper was.

If this is a serious concern it should be in the painting guide.

"Stearated" sandpaper is fine grit which has had a dry lubricant sprayed on it to reduce clogging. Commonly used in auto body refinishing. Used to be made with silicon based lubricants, hence the issue. Modern stearated paper is all water based, and I've never seen a problem with it. This is a non issue, just CYA from the manufacturers. Just make sure to solvent wipe well before coating anything and you'll be fine.

[Ian R]

Thanks Minaret that's good to know.

[Blue Stocking]

Minaret to the rescue--again x 2

[SvenG]

Originally Posted by minaret

"Stearated" sandpaper is fine grit which has had a dry lubricant sprayed on it to reduce clogging. Commonly used in auto body refinishing. Used to be made with silicon based lubricants, hence the issue. Modern stearated paper is all water based, and I've never seen a problem with it. This is a non issue, just CYA from the manufacturers. Just make sure to solvent wipe well before coating anything and you'll be fine.

Ah, so might this be why I had so much trouble with varnish beading up on surfaces sanded between coats ? It was a few years ago and there should be a thread on the topic here somewhere after I asked for help. I did rub the surfaces down with thinner between coats, thinking the tack-cloth might be the problem but with little success.

I hadn't suspected the sandpaper to be the culprit but I was using some paper that was absolutely great, it cut really nicely and lasted longer than I was used to. I think it was advertised as lasting three times as long as regular paper ... ?



-Sven