So I got the 2 coats of epoxy on the car and started the body filler work/blocking. I would like to do as much of the sanding as possible outside but saw in other posts that being in the sun will reduce the 7/14 day recoat window. Is this a function of the heat or UV that speeds up the curing of the epoxy? If UV, can I put some old sheets over the car in the areas I am not working on? Thanks.