Need help with using polyurathane

[tangman99]

I have my stain and I am getting ready to stain my new hood. I bought some minwax spar urathane which is an indoor/outdoor oil based urathane sealer that has a lot of protection from moisture. Is this ok to use being it is oiled based or will it cause problems with my tank?

Thanks.

 

[dwdenny]

I used oil based stain on mine. I dont see any problems as long as you seal the wood good so that it wont absorb water. I also painted the inside on my canopy with a good white paint that I got from Sherwin Williams.

 

[comatose]

thats fine, just make sure you stain and polyurathane before you paint.

 

[tangman99]

<a href=showthread.php?s=&postid=7034667#post7034667 target=_blank>Originally posted</a> by comatose
thats fine, just make sure you stain and polyurathane before you paint.

I'm a litttle confused. When I posted this, I was going to stain the inside of my canopy like the outside and then put the poly over the whole canopy. Now I'm going to paint the inside white. Would I not just paint the inside white and then put the poly over white paint to seal it?

 

[comatose]

If you get a good paint you really dont need to poly over the paint, they sell a good paint that is made for bathrooms and is used in high humidty areas.

 

[BeanAnimal]

Be careful with some "bathroom" paints as they have mildew prevention agents in them that could harm your tank.

 

[bassnman11]

Most polys are not water clear. If you put it over white, it will turn it a funky brown. Stain and poly the outside. Prime the inside with Kilz primer and give it a couple of coats of white exterior enamel. I use this method and several canopies are 3 years old with no problems.

 

[tangman99]

Yeah, I've read not to use any paint with a mildew preventative.

I've read several places where people have used poly over white and I have not seen that mentioned. Not doubting you, but is it that way with any poly or maybe just certain kinds? I have a spar urothane that I'm going to use over the stain for indoor/outdoor that I was planning on using.

 

[BeanAnimal]

Poly is an oil based product. It therefore has a yellow or goldish orange cast to it. Water clear stuff is a bit different (and does nto protect as well if you ask me). As poly ages it will yellow, the UV from your bulbs will surely help this process.

 

[comatose]

<a href=showthread.php?s=&postid=7036032#post7036032 target=_blank>Originally posted</a> by BeanAnimal
Be careful with some "bathroom" paints as they have mildew prevention agents in them that could harm your tank.

I don't think that is a problem like using the mildew resistent chaulk the hood would never come in contact with the water and there is never enough humidity in the hood to even make it sweat into the tank and if it does sweat that much i'd be more worried about the electrical connections than the paint.

as far as the poly over paint goes, you could always paint two pieces of scrap wood and on one poly over the paint to see if there is much of a difference in color change.

but bassnman11 is right, the more poly coats you use the more darker or yellow it will get. a good outdoor paint is fine over top of a primer. no need to poly over paint.