Polycrylic drip marks after sanding

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Forum topic by GCY posted 09-12-2016 12:53 AM 753 views 0 times favorited 2 replies Add to Favorites Watch
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1 post in 818 days

09-12-2016 12:53 AM

Topic tags/keywords: question

Hey All,
Wondering if anyone had this problem before. I applied polycrylic to a latex painted side with spray gun. It looked fine so i walked away. Came back and white drip marks were everywhere, which i thought no problem i can just sand it out. Well the picture I attached is after sanding with 220 (320 didn’t cut it) and I dry wet wiped it and tack clothed it. It is a lil bumpy but pretty smooth overall. It is not left over dust. I read somewhere that it goes away with the next coat, but i sprayed the other side which, was similar, and it didn’t help much. It looks great on the wood part however. If anyone has any ideas or has dealt with this before i appreciate any help

2 replies so far

View woodbutcherbynight's profile


5669 posts in 2605 days

#1 posted 09-12-2016 02:37 AM

When you sprayed this was the board upright? Based on the drips I am guessing yes. For large areas such as this I try to put the finish on and then get the largest surface area face up. I have run into this on a rare occasion spraying something too heavy that was on end and had to start over, i,.e. drawers. If you have ever seen someone that is in a hurry to use a spray can paint job they get it on and leave, same result. Before it can dry it sags, runs and looks terrible. Now if you wanted to have runs on purpose you would have had a flat nice surface. That would be Murphy screwing with you. (laughng)

-- Live to tell the stories, they sound better that way.

View pintodeluxe's profile


5797 posts in 3009 days

#2 posted 09-12-2016 03:17 AM

The trouble with aggressive sanding is you will probably remove the paint in some areas. If it were shellac or lacquer, you could keep sanding and top coating and it would even out. Poly doesn’t work that way.

I would sand back to bare wood, and start the process over. Good luck with it.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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