I have used Spar Urathane by Minwax works very well. Have it on a outside cham cage and it has been outside a little over a year with no bad effects. It is for boat or decking purpose.
:Was at the hardware store today, estimating costs for an enclosure im planing on builing. Melamine base with .5" or .75" plywood for the walls and top. I was looking at the stains and sealant, minwax to be precise. I was thinking that the spray on stain and sealant would be easier to use than brushing on the stain and sealant. However, Ive never used the spray type, and was wondering if anyone had any comments on it.